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

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https://hg.mozilla.org/integration/gaia-central/rev/7f56351baeef
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #15691 from hfiguiere/bug963695

Bug 963695 - Blacklist search (rocket bar) as it is not a standalone app. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/82615e3051aa
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 963695 - Blacklist search (rocket bar) as it is not a standalone app.
Bumping manifests a=b2g-bump