Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/a39946ecff22
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 897117 - [Clock] ClockView methods are not fully covered by unit tests r=ianliu

This commit also fixes a bug in the tested method's implementation,
where the minute boundary was being calculated incorrectly. This bug
would induce the method to asynchronously recurse during the second of
time before the minute rolled over.

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https://hg.mozilla.org/integration/gaia-central/rev/c09c5d448650
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 897103 - [Clock] Utility methods are not fully covered by unit tests r=ianliu