[llvm] RuntimeLibcalls: Make sure _Unwind_Resume entries are mutually exclusive (PR #164195)

[Martin Storsjö via llvm-commits]

mstorsjo wrote:

The git diff here shows things that I believe belong to earlier merged patches it seems, can you update it so that it shows the relevant bits only?

As for the change in the last commit - it looks trivial, but I'm not really familiar enough with tablegen at all to be able to confidently say what it does, unfortunately. So I can either give a "if you say so, it's probably right" review, or just defer to someone else.

https://github.com/llvm/llvm-project/pull/164195