Shipping both pacman and mkinitcpio hooks makes sbctl run multiple times instead of just once
Continuing archlinux/mkinitcpio/mkinitcpio#254 (closed),
shipping the hooks in /usr/lib/initcpio/post
and /usr/share/libalpm/hooks
leads to both mkinitcpio
and pacman
to launch them, when only one of them would be enough.