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

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https://hg.mozilla.org/integration/gaia-2_1/rev/ddc9b106b947
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #26745 from punamdahiya/Bug1106877_v2.1

Bug1106877 - [Gallery] - Fix of grey bars and cannot tap in thumbnails for images smaller than thumbnail container r=djf

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https://hg.mozilla.org/integration/gaia-2_1/rev/014925343e72
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1106877 - [Gallery] - Fix of grey bars and cannot tap in thumbnails for images smaller than thumbnail container r=djf
Bumping manifests a=b2g-bump