New comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/21721#issuecomment-626079279

Comment:
> One thing I found good is guessing what files to install into -lib and -devel packages.
> 
> Maybe that could be reworked as someting like `vgroupinstall devel` inside pkg_install?

Yeah, this sounds better, doesn't harm readability and reduce the repeated code for devel and libs.