Bumping gaia.json for 2 gaia-central revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/c1fe677869a6
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #12922 from alivedise/bugzilla/927310/activity-done-in-mozbrowser

Bug 927310 - Activitydone event in mozbrowser iframe

========

https://hg.mozilla.org/integration/gaia-central/rev/696b27fbb541
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 927310 - Activitydone event in mozbrowser iframe