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

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https://hg.mozilla.org/integration/gaia-central/rev/1a3a86dc975d
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #16864 from mcav/edit-alarm-text

Bug 978930 - [B2G][Clock] Edit Alarm will be seen instead of New Alarm. r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/020c659d30cc
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 978930 - [B2G][Clock] Edit Alarm will be seen instead of New Alarm after deleting an alarm. r=millermedeiros
Bumping manifests a=b2g-bump