[llvm] fix build error in MSVC build (PR #86622)

[via llvm-commits]

SevenIsSeven wrote:

> > > Would you like help merging/commiting this? We've also started seeing this warning/error in our downstream MSVC builds.
> > 
> > 
> > ”Only those with [write access](https://docs.github.com/articles/what-are-the-different-access-permissions) to this repository can merge pull requests.“ should I apply for write access from somewhere? or could you help me merge if you have the write access? thanks~
> 
> Yep, I have access and can merge for you. Contributing and commit access docs are here:
> 
> * https://llvm.org/docs/Contributing.html
> * https://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access

thank you so much.

https://github.com/llvm/llvm-project/pull/86622