This commit enforces dracut-kiwi-oem-repart and
dracut-kiwi-oem-dump to require dracut-kiwi-lib of the same exact
version. This prevents dracut-kiwi-lib and the packages
dependent on it being installed on a image with inconsistent versions.
Fixes#1529
This commit adds support for pacman package manager and, in
consequence, support for Arch Linux images. It also adds
the package definition for Arch Linux.