There's a merged pull request on the void-packages repository

libucontext: switch upstream + update to 0.10
https://github.com/void-linux/void-packages/pull/21743

Description:
New upstream (original source?) has updates to support `mips*` architectures.
This lets us build `ruby` and packages depending on it for `mips*` (e.g. `webkit2gtk`) again.