Unlike the other compiler-rt unit tests MemProf was not using the `generate_compiler_rt_tests()` helper that ensures the test is compiled using the test compiler (generally the Clang binary built earlier). This was exposed by https://github.com/llvm/llvm-project/pull/83088 because it started adding Clang-specific flags to COMPILER_RT_UNITTEST_CFLAGS if the compiler ID matched "Clang". This change should fix the buildbots that compile compiler-rt using a GCC compiler with LLVM_ENABLE_PROJECTS=compiler-rt. Reviewed By: vitalybuka Pull Request: https://github.com/llvm/llvm-project/pull/88074