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

common/hooks/{pre,post}-install: generalized libdir hook
https://github.com/void-linux/void-packages/pull/27328

Description:
this makes sure we don't have to worry about packages installing stuff in lib32/lib64, it will be automagically symlinked

if something is still left over for whatever reason, or if the opposite wordsize directory exists, that will be caught by pkglint

@Duncaen @ericonr @st3r4g