Bumping gaia.json for 4 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/f474d69baa13
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 934491 - Test failure in 1.2 only - ringtonePlayer.removeAttribute is not a function r=me a=tests

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https://hg.mozilla.org/integration/gaia-1_2/rev/74e0d823cb6d
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 924214 - [Messages] Some test files can't be run in standalone mode r=rwaldron a=tests

(cherry picked from commit cae1767c908f239236fa9f63b8206fc6b463338f)

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https://hg.mozilla.org/integration/gaia-1_2/rev/4c39e2f8f931
Author: Julien Wajsberg <felash@gmail.com>
Desc: Bug 922378 - [Messages] Some tests for SMS are failing locally r=rwaldron a=tests

(cherry picked from commit 5de99819ca192295a8179ddd345de6cf7ebb2287)

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https://hg.mozilla.org/integration/gaia-1_2/rev/f60620547561
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #13304 from timdream/keyboard-perm-remove

Bug 915570 - Gaia Part II, remove the old 'keyboard' permission, r=rudyl