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

========

https://hg.mozilla.org/integration/gaia-2_1/rev/2ea0e21f4a2c
Author: Rudy Lu <me@rudy.lu>
Desc: Bug 1007547 - Add keyboard and wordlist for Basque.
r=janjongboom.
a=2.1+, fabrice.
Bumping manifests a=b2g-bump