New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/36395#discussion_r837815868

Comment:
`vmove` copies files relative to `${DESTDIR}` into `${PKGDESTDIR}` and is used to move installation products from a main package to its subpackages; `vcopy` copies files relative to the current working directory into `${PKGDESTDIR}` and is the right thing to do here.