Your best bet is to use the Potx Exportables module. Here is a quote about it (from the module's project page):
... aims to ease the deployment of translation .PO files that the great Potx module generates. No longer will you have to manually upload these files to keep your site translations up to date. You can manually batch import all PO files defined in custom modules or alternatively, you can use the always useful Drush command to make things easier for you.
