[clang] [lld] [lld-macho][draft]Allow folding entries with identical FDE (PR #216895)

[Ellis Hoag via cfe-commits]

https://github.com/ellishg commented:

Overall looks good!

Can you copy the test `lld/test/MachO/icf-fold-dwarf-frame.s` from https://github.com/llvm/llvm-project/pull/213778? I think this might suffer from the same bug I described in https://github.com/llvm/llvm-project/pull/213778#discussion_r3806288211, but hopefully we can work around that.

https://github.com/llvm/llvm-project/pull/216895