[clang] [clang] Fix assertion failure with malformed destructor in literal type check (PR #177918)

[Mariya Podchishchaeva via cfe-commits]

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

I think this LGTM but maybe lets wait a couple of days in case someone else has an input too

https://github.com/llvm/llvm-project/pull/177918