Freeze break request for gnome-control-center (printers) UI changes, bug #690351

[Felipe Borges <felipeborges gnome org>]

Hi,

We have updated gnome-control-centers Printers' panel in order to fit
the new designs. These changes have included two new strings.

https://bugzilla.gnome.org/show_bug.cgi?id=690351

Since it's an old bug and makes Printers way more presentable while
empty (no printers), I hope we can make this exception.

Thanks,
Felipe.