[llvm] [llvm][DebugInfo] Add DW_AT_type to DW_TAG_enumeration_type in non-strict DWARF v2 mode (PR #98335)

[Paul T Robinson via llvm-commits]

https://github.com/pogo59 approved this pull request.

LGTM

> This will improve the experience of anyone using tools that can understand the attribute but for whatever reason are stuck building binaries containing v2 only.

I know NVTPX is stuck on v2, but I'd hope this is not a problem for that target. 

https://github.com/llvm/llvm-project/pull/98335