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

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https://hg.mozilla.org/integration/gaia-central/rev/830a947f0e7d
Author: chirarobert <robert.chira@softvision.ro>
Desc: Merge pull request #27040 from chirarobert/bug_1116076

Bug 1116076 - [v2.2] Fix test_rocketbar_add_collection failure

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https://hg.mozilla.org/integration/gaia-central/rev/400a3f7f0314
Author: Robert Chira <robertchira@P5075.(none)>
Desc: Bug 1116076 - [v2.2] Fix test_rocketbar_add_collection failure
Bumping manifests a=b2g-bump