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

========

https://hg.mozilla.org/integration/gaia-central/rev/2e4d09abb604
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #14418 from viorelaioia/bug_946666

Bug 946666 - Write a test for wakelock

========

https://hg.mozilla.org/integration/gaia-central/rev/f46cb1a0cf25
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 946666 - Write a test for wakelock