[libc-commits] [libc] [libc] Add 'Maintainers' file (PR #133297)

[Joseph Huber via libc-commits]

jhuber6 wrote:

> ```
> Yifan Zhu \
> yifanzhu at rochester.edu (email), [Schrodinger ZHU Yifan](https://github.com/schrodingerzhu) (GitHub)
> ```

We should just approve this and then you can add your details in a separate PR.

https://github.com/llvm/llvm-project/pull/133297