llvm-project

688a8840 - [clang][test] Specify value of `-fopenmp=libomp` for tests. (#177239)

[clang][test] Specify value of `-fopenmp=libomp` for tests. (#177239) `libomp` is the default value when unconfigured in cmake, but llvm can be configured to have `libgomp` be the default instead. Explicitly specify this value so the test does not fail when it assumes libomp is always the default. Fix for f369d23ceaa49ffa9e6ef9673851749d66b35b3f (#150580)