[llvm] [DebugInfo][JumpThreading] Fix missing debug location updates (PR #91581)

[J. Ryan Stinnett via llvm-commits]

https://github.com/jryans approved this pull request.

Looks good to me as well! 😄 

As before, I'll aim to merge this sometime between tomorrow (Sat) and the next working day (Mon) to allow for any further reviews.

https://github.com/llvm/llvm-project/pull/91581