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

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https://hg.mozilla.org/integration/gaia-central/rev/382af669abf4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16271 from KevinGrandon/bug_971561_system_banner_v2

Bug 971561 - [System2] Instantiable SystemBanner r=alive

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https://hg.mozilla.org/integration/gaia-central/rev/c11fa009d1cb
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 971561 - [System2] Instantiable SystemBanner r=alive
Bumping manifests a=b2g-bump