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

https://github.com/HadetTheUndying/void-packages mesa-update
https://github.com/void-linux/void-packages/pull/24312

mesa: update to 20.1.5.
I have briefly tested this on x86_64 and ppc64le, it's a bug fix release so i don't believe any of the patches need to be adjusted. If they do I'll close this and let someone more experienced have a hand at it.

A patch file from https://github.com/void-linux/void-packages/pull/24312.patch is attached