[clang][docs][OpenMP] Update status of OMPT support.

[mhalk]

Summary

Update documentation on implementation status of OMPT.

[mhalk]

Please, take a look as I've also marked the EMI callbacks as done and if the other added/changed descriptions match.
Just want to point out: the lower section is 5.1 (I was a bit confused as many people talked about 5.2).

clang/docs/OpenMPSupport.rst

 | loop                         | inclusive scan (matching C++17 PSTL)                         | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | memory management            | memory allocators                                            | :good:`done`             | r341687,r357929                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | memory management            | allocate directive and allocate clause                       | :good:`done`             | r355614,r335952                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | OMPD                         | OMPD interfaces                                              | :part:`not upstream`     | https://github.com/OpenMPToolsInterface/LLVM-openmp/tree/ompd-tests   |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT                         | OMPT interfaces                                              | :part:`mostly done`      |                                                                       |
+| OMPT                         | OMPT interfaces (callback support)                           | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | thread affinity              | thread affinity                                              | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | taskloop reduction                                           | :good:`done`             |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | task affinity                                                | :part:`not upstream`     | https://github.com/jklinkenberg/openmp/tree/task-affinity             |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | clause: depend on the taskwait construct                     | :part:`mostly done`      | D113540 (regular codegen only)                                        |

 | other                        | deprecating master construct                                 | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | OMPT                         | new barrier types added to ompt_sync_region_t enum           | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | OMPT                         | async data transfers added to ompt_target_data_op_t enum     | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | OMPT                         | new barrier state values added to ompt_state_t enum          | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
-| OMPT                         | new 'emi' callbacks for external monitoring interfaces       | :none:`unclaimed`        |                                                                       |
+| OMPT                         | new 'emi' callbacks for external monitoring interfaces       | :good:`done`             |                                                                       |
++------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
+| OMPT                         | device tracing interface                                     | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | 'strict' modifier for taskloop construct                     | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | inoutset in depend clause                                    | :none:`unclaimed`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+
 | task                         | nowait clause on taskwait                                    | :part:`worked on`        |                                                                       |
 +------------------------------+--------------------------------------------------------------+--------------------------+-----------------------------------------------------------------------+