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

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https://hg.mozilla.org/integration/gaia-central/rev/8cb2a9f95338
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #20399 from KevinGrandon/bug_1022515_search_dedupe

Bug 1022515 - Marketplace download suggestions still show up even if the app is installed

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https://hg.mozilla.org/integration/gaia-central/rev/a124eefe0e3f
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1022515 - Marketplace download suggestions still show up even if the app is installed r=amirn
Bumping manifests a=b2g-bump