gnome-documents: bump reqs.
gnome-photos: bump requirements.
zenity: update to 3.14.0.
mutter: bump requirements.
cheese: bump requirements.
cheese: update deps.
gnome-control-center: bump requirements.
gnome-shell: bump requirements.
gdm: use Arch pam config files; bump requirements; misc tweaks.
gnome-initial-setup: bump requirements.
gnome-maps: bump requirements.
python-gobject: update to 3.14.0.
gnome-music: bump requirements.
yelp-xsl: update to 3.14.0.
gcr: update to 3.14.0.
Misc tweaks to random gnome packages.