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

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https://hg.mozilla.org/integration/gaia-central/rev/d69102eda227
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Revert "Bug 965711 - [VsD Refresh] Homescreen/E.Me - Implement visual refresh to smart collections icons [r=ranbena]"

This reverts commit 76e4b6e148cc8f162c8e3d61c652ac330d13cad0.

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https://hg.mozilla.org/integration/gaia-central/rev/ef148f2f239e
Author: Amir Nissim <amirnissim@gmail.com>
Desc: Revert "Bug 960720 - Change the client side Smart Collection wallpapers [r=ranbena]"

This reverts commit 13c94caf282413bae2cc88cf2662b76ca0426f73.
Bumping manifests a=b2g-bump