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

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https://hg.mozilla.org/integration/gaia-central/rev/ad5f376f2d2a
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #26688 from crh0716/1090843_1

Bug 1090843 - Remove non-required modules from the loading path of the root panel r=eragonj

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https://hg.mozilla.org/integration/gaia-central/rev/1bbc6077814a
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1090843 - Remove non-required modules from the loading path of the root panel
Bumping manifests a=b2g-bump