Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/843a7f448e71
Author: AndreiH <andrei.hutusoru@gmail.com>
Desc: Merge pull request #13833 from teodosia/sms-contact-v1.2

Bug 935587 - test_sms_add_contact.py - Adjust assertion and enable test for Travis

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https://hg.mozilla.org/integration/gaia-1_2/rev/92f6c014ef00
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 935587 - test_sms_add_contact.py - Adjust assertion and enable test for Travis