[libclc] [libclc] Remove bitcode prepare utility from OpenCL library build (PR #174447)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

@arsenm question in general, they said that Intel has some modifications downstream. I'm curious why they would need to remove `wchar` or the `cpu` features here https://github.com/intel/llvm/blob/4decbf0da29f7daba8a87361456a264a331e2b5d/libclc/utils/prepare-builtins.cpp#L85-L110. Any guess?

https://github.com/llvm/llvm-project/pull/174447