[llvm] [DwarfDebug] Restore broken test llvm/test/DebugInfo/X86/pr12831.ll (PR #154636)

[Michael Buch via llvm-commits]

Michael137 wrote:

Can you rename the PR/commit title to state what is being fixed. I.e., something like "avoid generating empty DW_TAG_subprogram entries". Also, could you elaborate on how `getOrCreateSubprogramDIE(declaration)` causes us to call back into `getOrCreateSubprogramDIE(definition)`? That seems a bit odd

https://github.com/llvm/llvm-project/pull/154636