Increase compile concurrency for sanitizer-x86_64-linux-bootstrap bot.

[krasin]

Summary

After recent upgrades to sanitizer-x86_64-linux-bootstrap slave and
increased link concurrency (http://reviews.llvm.org/D15164),
the build time dropped from 4h30m to 2h40m. This change is aimed to
speed things even further.

zorg/buildbot/builders/sanitizers/buildbot_bootstrap.sh

 
 # Stage 3 / MemorySanitizer
 
 echo @@@BUILD_STEP build stage3/msan clang@@@
 
 mkdir -p ${STAGE3_MSAN_DIR}
 
 clang_msan_path=$ROOT/${STAGE2_MSAN_DIR}/bin
-cmake_stage3_msan_options="${CMAKE_COMMON_OPTIONS} -DCMAKE_C_COMPILER=${clang_msan_path}/clang -DCMAKE_CXX_COMPILER=${clang_msan_path}/clang++ -DLLVM_PARALLEL_COMPILE_JOBS=15"
+cmake_stage3_msan_options="${CMAKE_COMMON_OPTIONS} -DCMAKE_C_COMPILER=${clang_msan_path}/clang -DCMAKE_CXX_COMPILER=${clang_msan_path}/clang++ -DLLVM_PARALLEL_COMPILE_JOBS=32"
 
 (cd ${STAGE3_MSAN_DIR} && cmake ${cmake_stage3_msan_options} $LLVM && ninja clang) || \
   echo @@@STEP_FAILURE@@@
 
 
 echo @@@BUILD_STEP check-llvm check-clang stage3/msan@@@
 
 (cd ${STAGE3_MSAN_DIR} && ninja check-llvm) || echo @@@STEP_FAILURE@@@
 (cd ${STAGE3_MSAN_DIR} && ninja check-clang) || echo @@@STEP_FAILURE@@@
 
 
 # Stage 2 / AddressSanitizer
 
 build_stage2_asan
 
 check_stage2_asan
 
 # Stage 3 / AddressSanitizer
 
 echo @@@BUILD_STEP build stage3/asan clang@@@
 
 mkdir -p ${STAGE3_ASAN_DIR}
 
 clang_asan_path=$ROOT/${STAGE2_ASAN_DIR}/bin
-cmake_stage3_asan_options="${CMAKE_COMMON_OPTIONS} -DCMAKE_C_COMPILER=${clang_asan_path}/clang -DCMAKE_CXX_COMPILER=${clang_asan_path}/clang++ -DLLVM_PARALLEL_COMPILE_JOBS=10"
+cmake_stage3_asan_options="${CMAKE_COMMON_OPTIONS} -DCMAKE_C_COMPILER=${clang_asan_path}/clang -DCMAKE_CXX_COMPILER=${clang_asan_path}/clang++ -DLLVM_PARALLEL_COMPILE_JOBS=32"
 
 (cd ${STAGE3_ASAN_DIR} && cmake ${cmake_stage3_asan_options} $LLVM && ninja clang) || \
   echo @@@STEP_FAILURE@@@
 
 
 echo @@@BUILD_STEP check-llvm check-clang stage3/asan@@@
 
 export ASAN_OPTIONS="check_initialization_order=true:detect_leaks=1"