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

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https://hg.mozilla.org/integration/gaia-central/rev/9deb1e43dd2e
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #17508 from crh0716/964180

Bug 964180 - Introduce AMD to settings app, r=evelyn, etienne

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https://hg.mozilla.org/integration/gaia-central/rev/40f60ae4d99a
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 964180 - Introduce AMD to settings app
1. Support new panel model
2. Separate common logic to SettingsCache, PanelUtils, PageTransitions
Bumping manifests a=b2g-bump