Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/243d38a5760f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1001576 - [Home2] Use contextmenu event to detect when to enter drag/drop state to avoid race conditions with apz r=me
Bumping manifests a=b2g-bump