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

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https://hg.mozilla.org/integration/gaia-central/rev/415ca42c9902
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #21790 from timdream/input-mgmt-inproc-certified-app

Bug 1036577 - Never kill certified keyboard apps, r=rudyl

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https://hg.mozilla.org/integration/gaia-central/rev/5c1c65d7c5cd
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Bug 1036577 - Never kill certified keyboard apps
Bumping manifests a=b2g-bump