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

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https://hg.mozilla.org/integration/gaia-central/rev/5eb3570c2227
Author: Julien Wajsberg <felash@gmail.com>
Desc: Merge pull request #16521 from julienw/931514-currentCard

Bug 931514 - JavaScript Error: currentCard.addEventListener is not a fun...

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https://hg.mozilla.org/integration/gaia-central/rev/3f7dda11fc2c
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 931514 - JavaScript Error: currentCard.addEventListener is not a function r=alive
Bumping manifests a=b2g-bump