[llvm] [SFrames] Add FDEs for functions with .cfi_startproc (PR #154213)

[James Henderson via llvm-commits]

https://github.com/jh7370 commented:

I don't see anything glaringly obvious, but this is rather stretching my domain knowledge, so it would be best to get approval from someone else.

https://github.com/llvm/llvm-project/pull/154213