Bumping gaia.json for 2 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/167dedc02508
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #10944 from lissyx/bug892908

Bug 892908 - Prevent onsubmit from reloading system app from STK

========

https://hg.mozilla.org/integration/gaia-central/rev/ff51856c0815
Author: Alexandre Lissy <lissyx+github@lissyx.dyndns.org>
Desc: Bug 892908 - Prevent onsubmit from reloading system app from STK

When the user interacts in STK and is asked for a value to input,
tapping the Enter key on the keyboard will trigger reload of the
application.