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/086f5d05c63c
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #14201 from timdream/keyboard-disable-install

Bug 944295 - Uninstall the input app when the feature is not enabled, r=gchen
(cherry picked from commit 00b3f8e781ce8d721c50ea7015010b67dba69c2a)

Conflicts:
	apps/system/test/unit/mock_keyboard_manager.js