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/4a41f829eeb9
Author: Rudy Lu <me@rudy.lu>
Desc: Merge pull request #13342 from RudyLu/settings/Bug913784-language_keyboard_mapping

Bug 913784 - Language selection should also enable associated built-in
r=gnarf, arthur(cherry picked from commit 5cf3e2972c4d623ab0759ad85f6c4673ed9ed75f)

Conflicts:
	apps/settings/js/settings.js
	shared/resources/keyboard_layouts.json