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

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https://hg.mozilla.org/integration/gaia-central/rev/197c4cc9e477
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #26123 from punamdahiya/Bug1087060

Bug1087060-[Gallery]-Forward and back arrows should not overlap r=wilsonpage

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https://hg.mozilla.org/integration/gaia-central/rev/e6451a427459
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1087060-[Gallery]-Forward and back arrows should not overlap r=wilsonpage
Bumping manifests a=b2g-bump