New review comment by meator on void-packages repository

https://github.com/void-linux/void-packages/pull/38264#discussion_r929213738

Comment:
If it would utilize `$DESTDIR`, than you wouldn't have to specify `do_install()` at all because it would be handled automatically by the `gnu-makefile` build style. Specifying a non-default install directory via `$DESTDIR` is essential for package managers because they install the important files to a "fake" Linux system which contains just the package and then process this "fake" system to make it usable with XBPS.

The page I linked (https://www.gnu.org/software/make/manual/html_node/DESTDIR.html) and [the Manual](https://github.com/void-linux/void-packages/blob/master/Manual.md) contains more information.