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

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https://hg.mozilla.org/integration/gaia-central/rev/dd1090309fea
Author: George <georgeiscoming@gmail.com>
Desc: Merge pull request #18623 from cctuan/973454-3

Bug 973454 - [settings] refactor App permissions panel with AMD pattern

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https://hg.mozilla.org/integration/gaia-central/rev/1fdb47644687
Author: cctuan <georgeiscoming@gmail.com>
Desc: Bug 973454 - [settings] refactor App permissions panel with AMD pattern
Bumping manifests a=b2g-bump