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

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https://hg.mozilla.org/integration/gaia-central/rev/a1ca162887bf
Author: Zac <zcampbell@mozilla.com>
Desc: Merge pull request #13576 from teodosia/contact-photo-edit

Bug 937068 - Unxfail and enhance wait in test_contact_add_photo

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https://hg.mozilla.org/integration/gaia-central/rev/1b1086a9ecb2
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 937068 - Unxfail and enhance wait in test_contact_add_photo