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

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https://hg.mozilla.org/integration/gaia-central/rev/8dd1d2267841
Author: vingtetun <21@vingtetun.org>
Desc: Merge pull request #17001 from vingtetun/bug981277

Bug981277

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https://hg.mozilla.org/integration/gaia-central/rev/d9d417e6b371
Author: Vivien Nicolas <21@vingtetun.org>
Desc: Bug 981277 - Remove a sync reflow when using the cards view. r=etienne
Bumping manifests a=b2g-bump