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

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https://hg.mozilla.org/integration/gaia-central/rev/a10638edfc56
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #25038 from KevinGrandon/bug_1081211_app_chrome_packaged_test

Bug 1081211 - Add a marionette test for privileged app chrome layout

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https://hg.mozilla.org/integration/gaia-central/rev/2d1b49686e22
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1081211 - Add a marionette test for privileged app chrome layout r=eli
Bumping manifests a=b2g-bump