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

========

https://hg.mozilla.org/integration/gaia-central/rev/d7f1671443c5
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #10367 from lissyx/bug882607

Bug 882607 - Using white-space: pre-wrap for SMS and MMS
r=julien

========

https://hg.mozilla.org/integration/gaia-central/rev/e0fd3dfd5c1c
Author: Alexandre Lissy <lissyx@lissyx.dyndns.org>
Desc: Bug 882607 - Using white-space: pre-wrap for SMS and MMS

We also remove Utils.Message.format() which becomes useless.