New comment by PaperMountainStudio on void-packages repository

https://github.com/void-linux/void-packages/pull/25967#issuecomment-719041786

Comment:
- fixed cross compilation thanks to @ericonr 
- I used /usr/share/vim/vimfiles/syntax instead of /usr/share/vim/vim80/syntax/. This feels like a better place since the path does not depend on version of vim, is this ok?
- removed post_patch() because the fix in it should not be needed anymore because we swiched to #include without #.
- removed sed commands and forced make to use our variables instead