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

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https://hg.mozilla.org/integration/gaia-central/rev/e8c3c7727150
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #19646 from KevinGrandon/bug_1008020_collections_jshint

Bug 1008020 - [Collections App] Jshint fixes

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https://hg.mozilla.org/integration/gaia-central/rev/9d9c4e63981a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1008020 - [Collections App] Jshint fixes r=amirn
Bumping manifests a=b2g-bump