[clang] [clang][StaticAnalyzer] Fix crash in SimpleSValBuilder with unsigned __int128 and negative literals (PR #150225)

[Balazs Benics via cfe-commits]

https://github.com/steakhal requested changes to this pull request.

Thank you for the PR. Let's discuss this.

https://github.com/llvm/llvm-project/pull/150225