[Fix bug 1168789] Include "sr" in Mozillians PROD_LANGUAGES.
[Fix bug 1168789] Include "sr" in Mozillians PROD_LANGUAGES.

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