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

========

https://hg.mozilla.org/integration/gaia-central/rev/f07a6571a951
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 907177 - [Clock] Add integration tests

r=gaye
Bumping manifests a=b2g-bump