[clang] [Clang] Fix C library wrappers for offloading (PR #99716)

[Shilei Tian via cfe-commits]

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

Yeah, rewriting the function signature is gonna be quite a hassle. LG for now.

If we change the function signature, does it make easier to set default argument?

https://github.com/llvm/llvm-project/pull/99716