New comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/27166#issuecomment-745017102

Comment:
OK, I think the cross-compilation stuff is too specific to force into the `waf3` build style, but it would be nice to not repeat myself, so I created a `samba` build-helper that is used by all of the samba projects to do the right thing.