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

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https://hg.mozilla.org/integration/gaia-central/rev/1e13966b6d93
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16257 from KevinGrandon/bug_971569_ttl_view_followup

Bug 971569 - [System2] TTLView JSDoc style follow-up

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https://hg.mozilla.org/integration/gaia-central/rev/7846c6a359e7
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 971569 - [System2] TTLView JSDoc style follow-up
Bumping manifests a=b2g-bump