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

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https://hg.mozilla.org/integration/gaia-2_0/rev/6557f9624d5e
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23980 from KevinGrandon/bug_1063694_to_2_dot_oh

Bug 1063694 - [System] Fix SearchWindow prototype

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https://hg.mozilla.org/integration/gaia-2_0/rev/5286d14360a3
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1063694 - [System] Fix SearchWindow prototype r=alive
Bumping manifests a=b2g-bump