Hi, this is required by Gnome 3.12, more specifically by totem-3.12 at least. This is a fairly small package and should not cause much trouble.
Feel free to add all necessary arches.
Hi arches, please keyword appdata-tools for the upcoming Gnome 3.12 unmasking. It is a faily small package that shouldn't cause any trouble. You can test it by building totem-3.12 for example or downloading an appdata xml file (attached is the one from totem) and running appdata-validate against it.
Created attachment 375984 [details] totem.appdata.xml
~arm added
*** Bug 503606 has been marked as a duplicate of this bug. ***
*** Bug 512228 has been marked as a duplicate of this bug. ***
*** Bug 512230 has been marked as a duplicate of this bug. ***
dev-util/appdata-tools: Mark ~ppc ~ppc64, bug #508918
done alpha/ia64/sparc