Revert "xbps-src: bulk_build() use existing shell funcs."
Revert "xbps-src: bulk_build() use existing shell funcs."

This reverts commit 642cfa74c47e7517f7bb88cfb79d0958ab134d28.

necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages,necrophcodr/void-packages