[libc] [llvm] [LLVM] Port 'llvm-gpu-loader' to use LLVMOffload (PR #162739)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> Are the libraries expected to exist somewhere in the search path on the build host or on the host where I run the tests?

We pick them out at runtime via `dlopen`, so they only need to exist somewhere on the machine running the test's runtime path.

https://github.com/llvm/llvm-project/pull/162739