configs: update checkout.

Submodule system bef5af9..1d83db5:
> configs/pool/user-skel: regenerate the skeleton from scratch and
convert to submodule.
> user/artwork/solarized-kde-kate: update checkout, fix installation.
> system/essential/archlinux, configs/pool: do not install Sifr
libreoffice icons.
> system/essential/verbatim-toplevel: netctl: update WLAN profiles.