[clang] [Clang] Fixes builtin_bswapg builtin for bool type (PR #179177)

[Timm Baeder via cfe-commits]

tbaederr wrote:

No problem from my side, and according to https://github.com/llvm/llvm-project/pull/169285/, it has to work with `bool` being passed. So LGTM.

https://github.com/llvm/llvm-project/pull/179177