There is a new pull request by ericonr against master on the void-packages repository

https://github.com/ericonr/void-packages mesa
https://github.com/void-linux/void-packages/pull/27062

mesa: doesn't use talloc anymore.
Remove talloc-devel from makedepends.

A patch file from https://github.com/void-linux/void-packages/pull/27062.patch is attached