There is an updated pull request by foxlet against master on the void-packages repository

https://github.com/foxlet/void-packages gcc-multilib-public
https://github.com/void-linux/void-packages/pull/15630

[WIP] gcc-multilib: update to 9.2
Depends on #14822 in order to rebuild with 32-bit dependencies.

A patch file from https://github.com/void-linux/void-packages/pull/15630.patch is attached