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

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https://hg.mozilla.org/integration/gaia-central/rev/e0db6de9b351
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #16670 from crdlc/bug-956319

Bug 956319 - [Homescreen] Short, high velocity swipes should move to nex...

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https://hg.mozilla.org/integration/gaia-central/rev/c4761d7967a6
Author: crdlc <crdlc@tid.es>
Desc: Bug 956319 - [Homescreen] Short, high velocity swipes should move to next view
Bumping manifests a=b2g-bump