gnome games: remove gbrainy

gbrainy seems to be forever stuck as a GNOME 2 app.  It's no longer
a sensible default.
devel c(++): move ddd to suggests

The UI is from the 90s; it should not be a default
gnome-desktop, gnome-admin: remove alacarte

Alacarte was dropped upstream a couple of years ago.  It's part of MATE
now, not GNOME.  Most of the buttons no longer make sense.  It's also
really broken!
gnome-desktop: replace Tomboy with Bijiben

Tomboy should have been replaced by gnote ages ago, since gnote learned
how to work properly in GNOME 3, but Tomboy never did.  Bijiben is a
tomboy/gnote replacement and can import notes from both.
gnome-desktop: remove alternative-status-menu

This package no longer exists in GNOME 3.10
gnome-internet: drop epiphany-extensions

This package no longer exists in GNOME 3.8
gnome-multimedia: explicitly add missing gstreamer plugins
gnome-desktop: add deja-dup

Simple GNOME backup tool, much better than YaST's