Bumping gaia.json for 2 gaia-1_3 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/28f1426e3d3f
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #15299 from mcav/clock-alarm-enter-v1.3

Bug 946106 - [fugu][buri]pressing enter on the keyboard does not save alarm. r=mcav

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https://hg.mozilla.org/integration/gaia-1_3/rev/a56889d43cbe
Author: James Zhang <james.zhang@spreadtrum.com>
Desc: Bug 946106 - [fugu][buri]pressing enter on the keyboard does not save alarm. r=mcav