[zorg] Disable sanitzers on clang-cmake-armv8-lld

[peter.smith]

Summary

The combination of ARM, LLD and compiler-rt has flushed out some problems with CFI on ARM https://bugs.llvm.org/show_bug.cgi?id=38690 . Until these can be fixed or worked around disable the sanitizer build so that the CFI tests are not run. In an ideal world it would be possible just to disable the CFI tests but unfortunately the only option available is the sanitizers.

[peter.smith]

Committed r341059.

buildbot/osuosl/master/config/builders.py

def _get_sanitizer_builders():
                         useTwoStage=True,
                         testStage1=False,
                         extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57 -mthumb'",
                                           "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57 -mthumb'",
                                           "-DCOMPILER_RT_TEST_COMPILER_CFLAGS='-mcpu=cortex-a57 -mthumb'",
                                           "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'"])},
 
         ## AArch32 Self-hosting Clang+LLVM check-all + LLD + test-suite
+        # Sanitizers build disabled due to PR38690
         {'name': "clang-cmake-armv8-lld",
          'slavenames':["linaro-armv8-01-arm-lld"],
          'builddir':"clang-cmake-armv8-lld",
          'factory' : ClangBuilder.getClangCMakeBuildFactory(
                       clean=False,
                       checkout_compiler_rt=True,
                       checkout_lld=True,
                       test=True,
                       useTwoStage=True,
                       runTestSuite=True,
                       testsuite_flags=['--cppflags', '-mcpu=cortex-a57 -fuse-ld=lld',
                                        '--threads=64', '--build-threads=64'],
                       extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                                         "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'",
+                                        "-DCOMPILER_RT_BUILD_SANITIZERS=OFF",
                                         "-DLLVM_ENABLE_LLD=True"],
                ),
          'category'   : 'lld'},
 
         # AArch64 Clang+LLVM+RT check-all + test-suite + self-hosting
         {'name': "clang-cmake-aarch64-full",
          'slavenames':["linaro-thx1-01-aarch64-full", "linaro-armv8-01-aarch64-full"],
          'builddir':"clang-cmake-aarch64-full",