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

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https://hg.mozilla.org/integration/gaia-central/rev/face1e4ec4cc
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #26975 from ythej/bug_1062634

Bug 1062634 - [MMS] Portrait Images are misaligned when sending or receiving multiple attachments r=steveck-chung

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https://hg.mozilla.org/integration/gaia-central/rev/9d4868c31f46
Author: Vishnu Teja <vish.thej@gmail.com>
Desc: Bug 1062634 - [MMS] Portrait Images are misaligned when sending or receiving multiple attachments r=Steve Chung
Bumping manifests a=b2g-bump