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

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https://hg.mozilla.org/integration/gaia-central/rev/c286367cbca4
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #14603 from askeing/949364

Bug 949364 - Unxfail test_add_photo_to_contact.py

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https://hg.mozilla.org/integration/gaia-central/rev/cc220c2174e4
Author: askeing <askeing@gmail.com>
Desc: Bug 949364 - Unxfail test_add_photo_to_contact.py