[OpenMP][AMDGPU] Disable archer tests (#217)

There appears to be one particular libarcher test that is quite flaky on
the dockerized RHEL bots. Disable libarcher all together to reduce noise
in testing.

Author: jplehr

buildbot/osuosl/master/config/builders.py

@@ -2013,6 +2013,7 @@
                             "-DCLANG_DEFAULT_LINKER=lld",
                             "-DLLVM_TARGETS_TO_BUILD=X86;AMDGPU",
                             "-DLLVM_ENABLE_ASSERTIONS=ON",
+                            "-DLIBOMP_ARCHER_SUPPORT=OFF",
                             "-DCMAKE_C_COMPILER_LAUNCHER=ccache",
                             "-DCMAKE_CXX_COMPILER_LAUNCHER=ccache",
                             ],
@@ -2045,6 +2046,7 @@
                             "-DCLANG_DEFAULT_LINKER=lld",
                             "-DLLVM_TARGETS_TO_BUILD=X86;AMDGPU",
                             "-DLLVM_ENABLE_ASSERTIONS=ON",
+                            "-DLIBOMP_ARCHER_SUPPORT=OFF",
                             "-DCMAKE_C_COMPILER_LAUNCHER=ccache",
                             "-DCMAKE_CXX_COMPILER_LAUNCHER=ccache",
                             ],