[llvm] [DebugInfo] Assign best possible debugloc to bundle (PR #164573)

[Orlando Cazalet-Hyams via llvm-commits]

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

Thanks, I think this SGTM (with a tiny nit pick) if @dzhidzhoev is also happy.

>From what I can tell this this seems to only improve existing behaviour and looks fairly straightforward but I'm not super familiar with bundles - I'd feel better if someone with more familiarity could give it a look too, so possibly best to wait a little before merging to give others time to comment. 

https://github.com/llvm/llvm-project/pull/164573