machines/base_install/archlinux: move AUR packages behind prganalysis-tools
machines/base_install/archlinux: move AUR packages behind prganalysis-tools

This makes installing a base Arch Linux system only use official
package repositories, and fully non-interractive.

fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared,fishilico/shared