[libclc] [libclc] Only check the triple architecture for libclc (PR #194149)

[Joseph Huber via cfe-commits]

jhuber6 wrote:

Also does anyone know why we have pretend triples in this list like `clspv`? Why didn't we just make a new OS triple for clvk? Any chance of `clspv` being gutted entirely and made into a real triple so all the clang logic works?

https://github.com/llvm/llvm-project/pull/194149