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

========

https://hg.mozilla.org/integration/gaia-central/rev/84488fe79fc6
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1094076 - Disabling intermittent failed tests. r=me
Bumping manifests a=b2g-bump