[libclc] [libclc] Initial support for cross-compiling OpenCL libraries (PR #174022)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

This is much simpler now that I landed some of the other PRs, includes https://github.com/llvm/llvm-project/pull/174611

https://github.com/llvm/llvm-project/pull/174022