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

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https://hg.mozilla.org/integration/gaia-central/rev/385c85ff468f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #22741 from KevinGrandon/bug_1041620_rocketbar_search_homescreen_icon

Bug 1041620 - Add system browser icon to homescreen

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https://hg.mozilla.org/integration/gaia-central/rev/30ec5dc748ea
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1041620 - Add system browser icon to homescreen. r=alive r=benfrancis
Bumping manifests a=b2g-bump