[buildbot] Remove clang-cmake-aarch64-42vma builder

[maxim-kuvyrkov]

Summary

... and re-purpose hardware for 2nd clang-cmake-aarch64-full builder.
Hardware hosting "aarch64-full" builder is not very stable, and we
want to use a known-stable box for this important builder.
Hardware hosting "aarch64-42vma" builder seems to be solid, and this
builder is no longer very valuable.
We are going to run "aarch64-full" builder on the 2 slaves in parallel
until unstable-ish box crashes again. At that point we are going
to dicommision that box and leave aarch64-full bot running on 1 slave.

[maxim-kuvyrkov]

FOAD, once linaro-apm-05 is up after OS update, I'm going to connect it to silent master for 1-2 weeks to confirm stability. If everything is OK, I'll move it to main master.

[rengolin]

We have dropped 39-bit testing a while ago and now that all AArch64 Linux kernels are moving to 48-bits, we don't need to support every possible variation.

LGTM, thanks!

buildbot/osuosl/master/config/builders.py

def _get_sanitizer_builders():
                                           "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a15 -mthumb'",
                                           "-DCOMPILER_RT_TEST_COMPILER_CFLAGS='-mcpu=cortex-a15 -mthumb'",
                                           "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'",
                                           "-DLLVM_LIT_ARGS='-sv -j2'",
                                           "-DLLVM_PARALLEL_LINK_JOBS=2"])},
 
         # AArch64 Clang+LLVM+RT check-all + test-suite + self-hosting
         {'name': "clang-cmake-aarch64-full",
-         'slavenames':["linaro-apm-02"],
+         'slavenames':["linaro-apm-02", "linaro-apm-05"],
          'builddir':"clang-cmake-aarch64-full",
          'factory' : ClangBuilder.getClangCMakeBuildFactory(
                       jobs=8,
                       clean=False,
                       checkout_compiler_rt=True,
                       checkout_lld=False,
                       test=True,
                       useTwoStage=True,
                       testStage1=False,
                       runTestSuite=True,
                       nt_flags=['--cflag', '-mcpu=cortex-a57', '--threads=8', '--build-threads=8'],
                       env={'PATH':'/usr/lib64/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'},
                       extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57'",
                                         "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57'",
                                         "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'"],
                )},
 
-        # AArch64 Clang+LLVM+RT check-all at 42-bits VMA
-        {'name': "clang-cmake-aarch64-42vma",
-         'slavenames':["linaro-apm-05"],
-         'builddir':"clang-cmake-aarch64-42vma",
-         'factory' : ClangBuilder.getClangCMakeBuildFactory(
-                      jobs=8,
-                      clean=False,
-                      checkout_compiler_rt=True,
-                      checkout_lld=False,
-                      test=True,
-                      useTwoStage=False,
-                      runTestSuite=False,
-                      env={'PATH':'/usr/lib64/ccache:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'},
-                      extra_cmake_args=["-DCMAKE_C_FLAGS='-mcpu=cortex-a57 -DSANITIZER_AARCH64_VMA=42'",
-                                        "-DCMAKE_CXX_FLAGS='-mcpu=cortex-a57 -DSANITIZER_AARCH64_VMA=42'",
-                                        "-DLLVM_TARGETS_TO_BUILD='ARM;AArch64'"],
-               )},
-
           # Juno
           {'name' : "clang-native-aarch64-full",
            'slavenames' :["juno-aarch64-01"],
            'builddir':"clang-native-aarch64-full",
            'factory' : ClangBuilder.getClangCMakeBuildFactory(
                         jobs=4,
                         clean=True,
                         checkout_lld=False,