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

[Scott Todd via llvm-commits]

ScottTodd 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

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