[llvm] [Support] Fix the issue where the character being saved in Unicode causes a warning to be treated as an error in Visual Studio 2022. (PR #88513)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

Can you add the relevant error message you're getting to the PR's description please.

https://github.com/llvm/llvm-project/pull/88513