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

========

https://hg.mozilla.org/integration/gaia-1_2/rev/e1f29fb24bb9
Author: Florin Strugariu <bebef_1987@yahoo.com>
Desc: Merge pull request #13517 from teodosia/enable-sms-contact

Bug 936484 - [v1.2] Enable test_sms_add_contact.py

========

https://hg.mozilla.org/integration/gaia-1_2/rev/a3a3d1880129
Author: Teodosia Pop <teodosia.pop@gmail.com>
Desc: Bug 936484 - [v1.2] Enable test_sms_add_contact.py