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

[Joseph Huber via cfe-commits]

jhuber6 wrote:

> I don't know why this is a property that becomes a module flag

It's only used in TLI for some strlen optimizations I think. It'd be easy to turn off for OpenCL, and 100% correct to do so I'd say. I don't know if there's a better fix overall.

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