Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/c7d436b997d4
Author: Dale Harvey <dale@arandomurl.com>
Desc: Bug 1091615 - Add a wait for progress bar. r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/941690590446
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #25635 from punamdahiya/Bug1088051

Bug1088051 - Fix of stuck in image edit window on clicking edit icon immediately after image delete r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/8938e2ba3508
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1088051 - Fix of stuck in image edit window on clicking edit icon immediately after image delete r=djf
Bumping manifests a=b2g-bump