Bumping gaia.json for 1 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/e70e23fc4b7a
Author: Dale  Harvey <dale@arandomurl.com>
Desc: Merge pull request #10660 from alivedise/bugzilla/887683/camera-cancel-pick-in-background

Bug 887683: Cancel pick activity correctly while go to background.