Add lld to the list of dependencies for the lldb_scheduler

[stella.stamenova]

Summary

lld is currently not on the list of dependencies for the lldb_scheduler, so lld commits are not added to the blamelist for lldb builds

[ruiu]

Does this mean a commit to lld could potentially break lldb?

[stella.stamenova]

In D60230#1454293, @ruiu wrote:

Does this mean a commit to lld could potentially break lldb?

The LLDB bots currently have a dependency on LLD for the tests and commits to LLD break the bots with some frequency, but because the dependency is not listed for the lldb_scheduler, the LLD commits don't end up on the blamelist for the bots and it's a bit difficult to track down the break to LLD. This change adds LLD to the list of dependencies, so that we can see the corresponding LLD commits on the blamelist.

[gkistanova]

LGTM

zorg/trunk/buildbot/osuosl/master/master.cfg

c['schedulers'].append(SingleBranchScheduler(name="lld_scheduler",
                                 "lld"])))
 
 c['schedulers'].append(SingleBranchScheduler(name="lldb_scheduler",
                             treeStableTimer=2*60,
                             builderNames=get_all_for("lldb"),
                             change_filter=depends_on([
                                 "llvm",
                                 "cfe",
+                                "lld",
                                 "lldb"])))
 
 c['schedulers'].append(SingleBranchScheduler(name="sanitizer_scheduler",
                             treeStableTimer=2*60,
                             builderNames=get_all_for("sanitizer"),
                             change_filter=depends_on([
                                 "llvm",
                                 "cfe",