[ORC-RT] Disable ORC Runtime on ccache builders.

[lhames]

Summary

The ORC runtime contains assembly files that don't seem to build correctly
under ccache (e.g. https://lab.llvm.org/buildbot/#/builders/109/builds/18980).
This commit disables the ORC runtime on those builders, which seems to be the
same fix that was adopted for XRay and other compiler-rt libraries that use
assembly.

[vitalybuka]

LGTM, but @gribozavr is the owner of these bots.

[lhames]

@gribozavr This commit seems fairly tame, so I've landed it in 49063394567 to unblock llvm commit 6b2a96285b9 to maximize testing of the latter before we branch for LLVM 13.0.

If there are any problems with this please let me know and I can make changes or revert as necessary.

[lhames]

Looks like we need to poke the buildbots in order to land this config change. I've emailed @gkistanova to ask for help with that, and in the mean time I have reverted the LLVM change (6b2a96285b9) in 402b681fffa.

buildbot/osuosl/master/config/builders.py

# Clang fast builders.
     'builddir':"clang-x86_64-debian-fast",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     llvm_srcdir="llvm.src",
                     obj_dir="llvm.obj",
                     clean=True,
                     depends_on_projects=['llvm','clang','clang-tools-extra','compiler-rt'],
                     extra_configure_args=[
                         "-DCOMPILER_RT_BUILD_BUILTINS:BOOL=OFF",
+                        "-DCOMPILER_RT_BUILD_ORC:BOOL=OFF",
                         "-DCOMPILER_RT_BUILD_SANITIZERS:BOOL=OFF",
                         "-DCOMPILER_RT_BUILD_XRAY:BOOL=OFF",
                         "-DCOMPILER_RT_INCLUDE_TESTS:BOOL=OFF",
                         "-DCMAKE_C_FLAGS=-Wdocumentation -Wno-documentation-deprecated-sync",
                         "-DCMAKE_CXX_FLAGS=-std=c++11 -Wdocumentation -Wno-documentation-deprecated-sync",
                     ],
                     env={
                         'PATH':'/home/llvmbb/bin/clang-latest/bin:/home/llvmbb/bin:/usr/local/bin:/usr/local/bin:/usr/bin:/bin',
                         'CC': 'ccache clang', 'CXX': 'ccache clang++', 'CCACHE_CPP2': 'yes',
                     })},
 
     {'name' : "clang-x86_64-debian-new-pass-manager-fast",
     'tags'  : ["clang", "fast"],
     'workernames': ["gribozavr4"],
     'builddir': "clang-x86_64-debian-new-pass-manager-fast",
     'factory' : UnifiedTreeBuilder.getCmakeWithNinjaBuildFactory(
                     llvm_srcdir="llvm.src",
                     obj_dir="llvm.obj",
                     clean=True,
                     depends_on_projects=['llvm','clang','clang-tools-extra','compiler-rt'],
                     extra_configure_args=[
                         "-DCOMPILER_RT_BUILD_BUILTINS:BOOL=OFF",
+                        "-DCOMPILER_RT_BUILD_ORC:BOOL=OFF",
                         "-DCOMPILER_RT_BUILD_SANITIZERS:BOOL=OFF",
                         "-DCOMPILER_RT_BUILD_XRAY:BOOL=OFF",
                         "-DCOMPILER_RT_INCLUDE_TESTS:BOOL=OFF",
                         "-DENABLE_EXPERIMENTAL_NEW_PASS_MANAGER=ON",
                         "-DCMAKE_C_FLAGS=-Wdocumentation -Wno-documentation-deprecated-sync",
                         "-DCMAKE_CXX_FLAGS=-std=c++11 -Wdocumentation -Wno-documentation-deprecated-sync",
                     ],
                     env={