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

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https://hg.mozilla.org/integration/gaia-central/rev/1d5a3fddabf1
Author: John Ford <john@johnford.info>
Desc: Revert "Merge pull request #14037 from timdream/keyboard-oop-reenable"

This reverts commit afa10908940f8d84f9e0477deeeba6569bf780a1, reversing
changes made to 62009adb592cfb3bd68a06318c5d01552ede79e7.

From bug 942790:

This patch caused a serious performance hit to all of our keyboard UI
automation - the keyboard is now taking way too long too load across
the entire phone. We need to back this out.