[libclc] [llvm] [libclc] Replace shell-based external symbol check with lit test using llvm-nm (PR #187190)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

Is there nothing we can do to avoid hard-coding the triple? It does seem a little tough to handle this in a lit test.

https://github.com/llvm/llvm-project/pull/187190