llvm-project

f99cc277 - Create `hlsl` directory before generating headers into it (#188618)

Create `hlsl` directory before generating headers into it (#188618) This PR should fix an issue reported by https://github.com/llvm/llvm-project/pull/187440#issuecomment-4129823619 and https://github.com/llvm/llvm-project/pull/187610#issuecomment-4129976404 where using `clang_generate_header` to generate a header into a directory that did not exist caused an error.