Bumping gaia.json for 1 gaia-1_3 revision(s) a=gaia-bump
Truncated some number of revisions since the previous bump.

========

https://hg.mozilla.org/integration/gaia-1_3/rev/2182df58cc4e
Author: Gabriele Svelto <gsvelto@mozilla.com>
Desc: Bug 944242 - Properly handle do-not-track options when upgrading from 1.1 r=kaze