[llvm] [JITLink] Allow multiple relocations at same offset in EHFrameEdgeFixer (PR #68252)

[Jonas Hahnfeld via llvm-commits]

hahnjo wrote:

> Are you happy to land this as a temporary fix for now on the understanding that it may need to be reverted, and the solution redesigned, once we come up with a long term design for LinkGraph edges?

Yes absolutely, evolving design always needs to make sure the code is consistent. With the current design, I think the approach attempted in this PR is the most consistent we can do.

https://github.com/llvm/llvm-project/pull/68252