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

========

https://hg.mozilla.org/integration/gaia-central/rev/7ddd123f1c7a
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Merge pull request #14357 from eeejay/bug-943123

Bug 943123 - [E-Mail] Update styling of value selector. Regression from ... r=jburke

========

https://hg.mozilla.org/integration/gaia-central/rev/bda33381e668
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 943123 - [E-Mail] Update styling of value selector. Regression from bug #914892