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

========

https://hg.mozilla.org/integration/gaia-central/rev/82d783509a92
Author: Ghislain 'Aus' Lacroix <aus@noiseport.org>
Desc: Merge pull request #13443 from nullaus/awesome-bar-ui-master

bug 925970

========

https://hg.mozilla.org/integration/gaia-central/rev/587f7b477669
Author: Ghislain 'Aus' Lacroix <aus@mozilla.com>
Desc: bug 925970

* Same visual refresh but, for commit against master.

r=amirn@e.me