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

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https://hg.mozilla.org/integration/gaia-1_4/rev/0264b8d99049
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #19405 from mcav/fix-onready

Bug 1011682 - [B2G][Open_C][Clock] Stop, snooze buttons do not work. r=millermedeiros a=1.4+

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https://hg.mozilla.org/integration/gaia-1_4/rev/58aa0b75d581
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1011682 - [B2G][Open_C][Clock] Stop, snooze buttons do not work on v1.4.
Bumping manifests a=b2g-bump