New review comment by sgn on void-packages repository

https://github.com/void-linux/void-packages/pull/31615#discussion_r656678827

Comment:
It only compiles 276 files. On cross-compiling, if we depends on `cmake` in `hostmakedepends`. Sometime, when host `cmake` is being built, the cross-builder will build host `cmake` themselves, thus wasting effort.