[Bug 57457] Support glade-3

[Sven Herzberg]

Public bug reported:

Please change the dependencies of gnome-devel from "…, glade-gnome (>=
2.12.1), …" to "…, glade-gnome (>= 2.12.1) | glade-gnome-3, …" so I
don't need to have both versions of Glade installed if I want gnome-
devel and glade-gnome-3.

** Affects: meta-gnome2 (Ubuntu)
     Importance: Untriaged
         Status: Unconfirmed

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Support glade-3
https://launchpad.net/bugs/57457