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

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https://hg.mozilla.org/integration/gaia-central/rev/99bea97a4bd9
Author: punamdahiya <punamdahiya@yahoo.com>
Desc: Merge pull request #26751 from punamdahiya/Bug1092967

Bug1092967 - Gallery app to follow text selection pattern r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/5e6a454c2737
Author: Punam Dahiya <punamdahiya@yahoo.com>
Desc: Bug1092967 - Gallery app to follow text selection pattern r=djf
Bumping manifests a=b2g-bump