[fix bug 1190535] Enable en-GB locale.
[fix bug 1190535] Enable en-GB locale.

johngian/mozillians,mozilla/mozillians,chirilo/mozillians,anistark/mozillians,chirilo/mozillians,chirilo/mozillians,safwanrahman/mozillians,johngian/mozillians,anistark/mozillians,johngian/mozillians,fxa90id/mozillians,fxa90id/mozillians,akatsoulas/mozillians,mozilla/mozillians,akarki15/mozillians,safwanrahman/mozillians,chirilo/mozillians,fxa90id/mozillians,anistark/mozillians,mozilla/mozillians,safwanrahman/mozillians,akarki15/mozillians,brian-yang/mozillians,brian-yang/mozillians,akarki15/mozillians,akatsoulas/mozillians,safwanrahman/mozillians,brian-yang/mozillians,fxa90id/mozillians,brian-yang/mozillians,mozilla/mozillians,akatsoulas/mozillians,anistark/mozillians,johngian/mozillians,akatsoulas/mozillians,akarki15/mozillians