[Mlir-commits] [mlir] [mlir] Prepend include directories before LLVM includes (PR #121223)

[Fangrui Song]

https://github.com/MaskRay approved this pull request.

LGTM. clang/CMakeLists.txt has been using this since 73963b67c1b59135116516b45bc835db997d5537 (2011)

https://github.com/llvm/llvm-project/pull/121223