Recommended update for empathy

This recommended update provides version 3.12.8 of empathy and fixes the following issues:
- User help suggests "ignore SSL certificate errors" option for Jabber accounts "if you trust the server you are connecting to". (bgo#705326)
- goa-mc-plugin: Remove Facebook chat using Jabber, after Facebook dropped support for XMPP in version 2.0 of the Graph API. (bgo#746100)
- Updated translations.

Fixed bugs
Selected Binaries
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