Fix compiler family detection issue with clang-cl on macOS #2127

Job	Run time
Test wasm32-wasip1-thread	28s
Test (stable)	10s
Test CUDA support	22s
Test (beta)	10s
MSRV (ubuntu-latest)	19s
Test (nightly)	11s
Rustfmt	11s
MSRV (windows-latest)	35s
Test (linux32)	18s
Test build-std (aarch64-tvos)	23s
MSRV (macos-latest)	27s
Test (macos)	12s
Test build-std (aarch64-tvos-sim)	21s
semver-checks	2m 21s
Test (aarch64-macos)	12s
Test build-std (x86_64-tvos)	23s
Test (aarch64-ios)	12s
Test (win32)	18s
Test wasm (wasm32-unknown-unknown)	12s
Clippy	16s
Test (win64)	7s
Test (mingw32)	9s
Test (mingw64)	8s
Test (windows-2019)	22s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	8s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	12s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	7s
	9m 14s

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