Pontoon: Update Welsh (cy) localization of Marketplace
Pontoon: Update Welsh (cy) localization of Marketplace

Localization authors:
- Rhoslyn Prys <rprys@yahoo.com>

jasonthomas/zamboni,diox/zamboni,diox/zamboni,jasonthomas/zamboni,diox/zamboni,mozilla/zamboni,diox/zamboni,mozilla/zamboni,jasonthomas/zamboni,jasonthomas/zamboni,mozilla/zamboni,mozilla/zamboni