[llvm] [DWARF] Don't leak line numbers onto frame-setup instructions (PR #161845)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Thanks! 

> Were the test checks auto-generated? there's no comment to that effect. If they were, I'd expect an instruction for regenerating the test to be present.

No they were not. I can change this to use auto-generated checks if you think that's better for maintainability etc?

https://github.com/llvm/llvm-project/pull/161845