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

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https://hg.mozilla.org/integration/gaia-central/rev/430d17b76b35
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #21937 from KevinGrandon/bug_1039201_search_icon_grid

Bug 1039201 - [Search] Search results in grid only format

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https://hg.mozilla.org/integration/gaia-central/rev/4d6a6901afb2
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1039201 - [Search] Search results in grid only format r=daleharvey
Bumping manifests a=b2g-bump