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

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https://hg.mozilla.org/integration/gaia-central/rev/cecaef2b8441
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23636 from KevinGrandon/bug_1061674_ssl_icon_updates

Bug 1061674 - [Rocketbar] SSL icon asset swap

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https://hg.mozilla.org/integration/gaia-central/rev/12643ea8f566
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1061674 - [Rocketbar] SSL icon asset swap r=epang
Bumping manifests a=b2g-bump