Bumping gaia.json for 2 gaia-1_2 revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_2/rev/b17bfc2137b6
Author: Salvador de la Puente González <salva@unoyunodiez.com>
Desc: Merge pull request #13551 from lodr/bug-934921-null-sms

Bug 934921 - Making getSegmentInfoForTest() asynchronous
r=arcturus(cherry picked from commit b9755c73c7faaf949d74c14f2a58dd542b5da543)

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https://hg.mozilla.org/integration/gaia-1_2/rev/5e21daf11190
Author: Timothy Guan-tin Chien <timdream@gmail.com>
Desc: Merge pull request #13658 from RudyLu/keyboard/Bug931201-dutch_keyboard_layout

Bug 931201 - Add Dutch keyboard layout, fix some locale-layout mapping, r=timdream(cherry picked from commit ea2711787ece8d6f4d22c310d3e8a8080a5ee090)