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

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https://hg.mozilla.org/integration/gaia-central/rev/3ed7544ee8f4
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #11230 from KevinGrandon/content2-initial

Bug 898352 - Implement homescreen rocket bar and opensearch.

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https://hg.mozilla.org/integration/gaia-central/rev/922968c62be8
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 898352 - Implement homescreen rocket bar and opensearch r=vingtetun