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

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https://hg.mozilla.org/integration/gaia-central/rev/4293080ceedf
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #16359 from evanxd/bug-921723

Bug 921723 - Sync progress indicator persists onto day view

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https://hg.mozilla.org/integration/gaia-central/rev/f2163cf15687
Author: Evan Xd <itoyxd@gmail.com>
Desc: Bug 921723 - Move the progress indicator on the below of time-header.
Bumping manifests a=b2g-bump