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

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https://hg.mozilla.org/integration/gaia-1_2/rev/e6e627672136
Author: Malini Das <mdas@mozilla.com>
Desc: Bug 945284 - Bump gaiatest version to 0.20. r=dhunt
Bug 941468 - Only load forms.js once per-process. r=yxl, a=koi+
Bug 943234 - Part 1: Return mozContact in updateContact. r=vicamo, a=koi+
Bug 943234 - Part 2: Update test cases. r=vicamo, a=koi+
Bug 946479 - nsIFilePickers/nnsIColorPicker cannot run in parallel for a single HTMLInputElement. r=bz, a=koi+
Bug 898593 - Fix intermittent failures in test_bug413958.html and others by making SimpleTest.monitorConsole() ignore unexpected messages by default. r=ted, a=test-only
Bug 904227 - Expect any number of calls to SendAsyncScrollDOMEvent. r=kats, a=test-only
Bug 941468 - Tweaks to the b2g26 patch that landed. a=koi+
Bug 946479 - Remove unneeded line. a=bustage
Backed out changesets a8ba3f906023 and 59e38d576489 (bug 933483) for causing bug 946726. a=backout
Merge b2g26 to v1.2f. a=merge