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

========

https://hg.mozilla.org/integration/gaia-central/rev/81a345b55e2c
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #12804 from alivedise/bugzilla/921194_master/fix-trustedui

Bug 921194 - Fix trustedUI asynchronous app state.  r=timdream

========

https://hg.mozilla.org/integration/gaia-central/rev/0ea488a8c17c
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 921194 - Fix trustedUI asynchronous app life state