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

========

https://hg.mozilla.org/integration/gaia-1_2/rev/034137654592
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #13075 from wanderview/contacts-export-search-select

Bug 930693: Fix checkbox select in export search mode. +shepherd r=arcturus

========

https://hg.mozilla.org/integration/gaia-1_2/rev/48fafab67a9e
Author: Ben Kelly <bkelly@mozilla.com>
Desc: Merge pull request #13043 from wanderview/contacts-size-reflow

Bug 921685: Read device geometry info from cookie to avoid sync reflows. r=arcturus