[clang] [Clang] Do not emit 'wchar' module flag for OpenCL (PR #174454)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> I think the language is the wrong question. The library functions are a property of the target ABI, not the language

It might be possible to normally infer this from the triple and only emit the module metadata if the user overrides it somehow

https://github.com/llvm/llvm-project/pull/174454