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

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https://hg.mozilla.org/integration/gaia-central/rev/c6ae07541555
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20373 from KevinGrandon/bug_1021389_search_entry_point

Bug 1021389 - Local app search support for entry points is broken

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https://hg.mozilla.org/integration/gaia-central/rev/318a52726825
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1021389 - Local app search support for entry points is broken r=benfrancis
Bumping manifests a=b2g-bump