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

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https://hg.mozilla.org/integration/gaia-central/rev/1903de002816
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #14710 from viorelaioia/bug_949897

Bug 949897 - test_cards_view_kill_apps_with_two_apps.py intermittently fails

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https://hg.mozilla.org/integration/gaia-central/rev/33ae67ce69e9
Author: Viorela Ioia <viorelaioia@gmail.com>
Desc: Bug 949897 - test_cards_view_kill_apps_with_two_apps.py intermittently fails