[llvm] [NVPTX] Fix for LTO dwarf emission when multiple CUs with a mix of DebugDirectivesOnly and NoDebug (PR #190371)

[Alexander Yermolovich via llvm-commits]

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

Left nit.
Please wait couple of days for other reviewers.

https://github.com/llvm/llvm-project/pull/190371