Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/e3d925b497f5
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #12097 from vingtetun/backout-fps-regression-contacts-fixed

Backout bug 903401 for fps regression on the contacts app

========

https://hg.mozilla.org/integration/gaia-central/rev/f72ae79b2734
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Backout bug 903401 for fps regression on the contacts app