message: Print number of cores on macOS in GHA
diff: @@ -341,6 +341,7 @@ jobs:
  ./check_env.py
  which -a clang
  sysctl -n machdep.cpu.brand_string
  + sysctl -n hw.ncpu
  - name: Build LLVM
  run: |
  @@ -384,6 +385,7 @@ jobs:
  ./check_env.py
  which -a clang
  sysctl -n machdep.cpu.brand_string
  + sysctl -n hw.ncpu
  - name: Build LLVM
  run: |
  