[clang] [clang][DebugInfo] Fix iterator invalidation during EmitGlobalVariable (PR #72415)

[Felipe de Azevedo Piovezan via cfe-commits]

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

LGTM. If there are others waiting on the fix, and since this is a fairly trivial change, you may want to push it soonish

https://github.com/llvm/llvm-project/pull/72415