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

========

https://hg.mozilla.org/integration/gaia-central/rev/318f2018b8b6
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #17564 from chirarobert/unxfail_fix_cards_view_test_master

Bug 987133 - Unxfail and fix test_cards_view_with_two_apps.py

========

https://hg.mozilla.org/integration/gaia-central/rev/f61e798a3652
Author: chirarobert <robert.chira@softvision.ro>
Desc: Bug 987133 - Unxfail and fix test_cards_view_with_two_apps.py
Bumping manifests a=b2g-bump