Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/2c344e1d5c7a
Author: Corey Frang <gnarf37@gmail.com>
Desc: Bug 907562 - [Messages] the "unread" bit is not always removed when we read a thread - r=julienw

https://bugzilla.mozilla.org/show_bug.cgi?id=907562

* The path for switching from #new to #thread=xxx didn't call ThreadListUI.mark
* Simplified the path difference, only removing the "slide" effect from going from #new to #thread=xxx