[libc] Fixing the build command for benchmarks.

Building libc without clang fails with:
CMake Error at /home/asteinhauser/llvm-project/libc/CMakeLists.txt:49 (message):
'clang' and 'clang-tools-extra' are required in LLVM_ENABLE_PROJECTS to
lint llvm-libc. The linting step performs important checks to help prevent
the introduction of subtle bugs, but it may increase build times.

Reviewers: sivachandra

Reviewed By: sivachandra

Differential Revision: https://reviews.llvm.org/D80495

GitOrigin-RevId: 504d8d9d8a20fae1717bcf65dbc7577d0f26ffd7
1 file changed