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

https://github.com/znedw/void-packages master
https://github.com/void-linux/void-packages/pull/21413

boringtun: update to 0.3.0.
compiles on musl without a patch now :)

A patch file from https://github.com/void-linux/void-packages/pull/21413.patch is attached