[clang] [-Wunsafe-buffer-usage] Fix debug notes for unclaimed DREs (PR #80787)

[Ziqing Luo via cfe-commits]

https://github.com/ziqingluo-90 approved this pull request.

LGTM!  
I think I did something similar locally when I collected data of unclaimed DREs on those big adopter projects.   So I guess the data that we used to find major missing patterns for fix-its is still valid.

https://github.com/llvm/llvm-project/pull/80787