[llvm] [DebugInfo] Use correct unit when creating variable across CU boundary (PR #133282)

[David Blaikie via llvm-commits]

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

Could remove the duplicate DIGlobalVariable to simplify the test case/not have that oddity in this case?

Shouldn't be /too/ hard to create this situation with a legitimate situation using LTO (even just llvm-link to merge a couple of files) - is it sufficient to have one CU with a type (any use of the type should get that emitted - like use the type as a function parameter type) and then the static member defined in another translation unit? Seems like that'd be easy to create... 

https://github.com/llvm/llvm-project/pull/133282