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

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https://hg.mozilla.org/integration/gaia-central/rev/166c0ff9af0c
Author: crdlc <crdlc@tid.es>
Desc: Bug 1010162 - Follow up 1008144 - Decouple layout logic from app r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/c5da5f228934
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1003175 - Investigate failure in test_cards_view_kill_apps_with_two_apps.py"

This reverts commit 6bad75c2a3af253f1d7ebbcae47cd01ab80cae9f.
Bumping manifests a=b2g-bump