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

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https://hg.mozilla.org/integration/gaia-central/rev/260f4e993990
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #14534 from viorelaioia/bug_948385

Bug 948385 - Merge test_set_alarm_repeat, test_set_alarm_snooze, test_set_alarm_sound.py

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https://hg.mozilla.org/integration/gaia-central/rev/d4550889f8f7
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 948385 - Merge test_set_alarm_repeat, test_set_alarm_snooze, test_set_alarm_sound.py