[lld] [LLD][COFF] Add support for ARM64X same-address thunks (PR #151255)

[Jacek Caban via llvm-commits]

cjacek wrote:

Thanks for the bisect and the report! I can’t reproduce it, but I believe I see what’s going wrong. We likely store the alias as `Undefined` in the `aliases` vector, resolve it while handling the local import, but later try to resolve it again from aliases, treating it as if it were still `Undefined`. I’ll work on a fix.

https://github.com/llvm/llvm-project/pull/151255