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

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https://hg.mozilla.org/integration/gaia-central/rev/9446125ac99a
Author: Fernando Jiménez Moreno <ferjmoreno@gmail.com>
Desc: Merge pull request #20696 from ferjm/bug1023266.mobileid.permission.2

Bug 1023266 - Make the Mobile ID API privileged. r=arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/52c1791c0a91
Author: Fernando Jiménez <ferjmoreno@gmail.com>
Desc: Bug 1023266 - Make the Mobile ID API privileged. r=arthurcc
Bumping manifests a=b2g-bump