clang: Fix the typo for CMAKE_CXX_COMPILER_ID_TEST_FLAGS
Fix typo from !5058 (merged).
Issue: #21097 (closed)
Topic-rename: CMakeDetermineCXXCompiler-clang-typo
Edited by Brad King
Fix typo from !5058 (merged).
Issue: #21097 (closed)
Topic-rename: CMakeDetermineCXXCompiler-clang-typo