New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/31811#issuecomment-879974530

Comment:
Some build styles already run tests in parallel, please add disable_parallel_check there too.
It can be simpler with `if [ -z "$disable_parallel_check" ] local _check_jobs="${makejobs}"; make ... ${_check_jobs}`