[llvm] [ORC] Add automatic shared library resolver for unresolved symbols. (PR #148410)

[via llvm-commits]

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SahilPatidar wrote:

since we currently only support Mach-O.
So I added `@rpath` and `@loader_path` handling, plus extra path searching (with and without extensions like A.dylib or just A when searching for a library).

https://github.com/llvm/llvm-project/pull/148410