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

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https://hg.mozilla.org/integration/gaia-central/rev/fa52ed7a9f72
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #15893 from KevinGrandon/bug_966312_title_app_translations

Bug 966312 - App titles are not being translated r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/b2477363465a
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 966312 - App titles are not being translated r=alive
Bumping manifests a=b2g-bump