New review comment by leahneukirchen on void-packages repository

https://github.com/void-linux/void-packages/pull/28785#discussion_r841925345

Comment:
https://github.com/archlinux/svntogit-packages/blob/packages/gcc/trunk/PKGBUILD#L461 uses

`  make -C gcc DESTDIR="$pkgdir" jit.install-common jit.install-info` which seems nicer?