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

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https://hg.mozilla.org/integration/gaia-central/rev/305c34da82e1
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1001638 - [Home2] Final user testing tweaks r=me

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https://hg.mozilla.org/integration/gaia-central/rev/f272c2f5ef70
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1000272 - Show google search link if < 2 places results. r=benfrancis
Bumping manifests a=b2g-bump