[compiler-rt] [Darwin][CompilerRT] Set compiler ID to 'Clang' for Compiler RT Tests for Apple Clang (PR #121858)

[Alexander Richardson via llvm-commits]

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@@ -79,7 +79,12 @@ endif()
 
 get_filename_component(_test_compiler_name "${COMPILER_RT_TEST_COMPILER}" NAME)
 if("${COMPILER_RT_TEST_COMPILER}" STREQUAL "${CMAKE_C_COMPILER}")
-  set(COMPILER_RT_TEST_COMPILER_ID "${CMAKE_C_COMPILER_ID}")
+  if ("${CMAKE_C_COMPILER}" STREQUAL "AppleClang")
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arichardson wrote:

This seems wrong, shouldn't it be "CMAKE_C_COMPILER_ID"?

https://github.com/llvm/llvm-project/pull/121858