Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/347488f36be5
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Merge pull request #25382 from mcav/sound-upgrade-2

Bug 1078672 - [Clock] Alarm sound becomes "No Sound" after OTA upgrade f...

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https://hg.mozilla.org/integration/gaia-central/rev/ed3bf7bc47d7
Author: Marcus Cavanaugh <m@mcav.com>
Desc: Bug 1078672 - [Clock] Alarm sound becomes "No Sound" after OTA upgrade from 2.0 to 2.1.

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https://hg.mozilla.org/integration/gaia-central/rev/594692952877
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #23520 from punamdahiya/Bug1042319

Bug 1042319 - [Gallery] Update gallery edit UI r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/5827371feac9
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug 1042319 - [Gallery] Update gallery edit UI r=djf
Bumping manifests a=b2g-bump