String freeze break request for gnome-packagekit

[Richard Hughes <hughsient gmail com>]

We're planning to ship gnome-software (a new application installer) in
3.10 as a technology preview. The existing package based
gnome-packagekit installer should really be renamed "Packages"
otherwise we have two "Software" items in the shell overview.

I'm requesting to break one string from "Software" to "Packages" or
even "Package Installer" if this is difficult to translate.

Richard