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

========

https://hg.mozilla.org/integration/gaia-central/rev/7a895dbd45d2
Author: Jon Hylands <jhylands@mozilla.com>
Desc: Bug 1023877 - Fixed reference workloads to work on flame. r=dhunt
Bumping manifests a=b2g-bump