New comment by Chocimier on void-packages repository

https://github.com/void-linux/void-packages/pull/27905#issuecomment-765628914

Comment:
Move pre_check function to end of template so phases are in order of execution.
Please use [README.voidlinux](https://github.com/void-linux/void-packages/blob/master/Manual.md#void-specific-documentation) instead of install.msg.
Otherwise good.