New gnome-software translatable string

[Sebastien Bacher]

Hey translators,

The gnome-software template just has been updated to include a new 
"Ubuntu Software" string, it's translatable on
https://translations.launchpad.net/ubuntu/xenial/+source/gnome-software/+pots/gnome-software/<locale>/538/+translate

The change is in context of 
https://bugs.launchpad.net/ubuntu/+source/gnome-software/+bug/1570479, 
we are still discussing doing the change for xenial release or in a SRU, 
if we include it in the release the string would need to be translated 
today to be part of the export scheduled for tomorrow

Cheers,
Sebastien Bacher