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/562a33d287a7
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #13410 from timdream/keyboard-rename-followup

Bug 935350 - Rename 'keyboard' role in homescreen, r=rudyl
(cherry picked from commit c367635134a18ba98e2f9267d0c70da7542239ba)

Conflicts:
	apps/homescreen/js/grid.js