Fetch gaia-l10n repos

get-repos.py

#!/usr/bin/python

import json
import subprocess

locales = json.load(open("/home/work/B2G-unagi/gaia/locales/languages_all.json"));

for key, val in locales.items():
    cmd = ["hg", "clone", "http://hg.mozilla.org/gaia-l10n/" + key, key]
    print " ".join(cmd)
    output = subprocess.check_output(cmd)
    print output

Edit line 6 to match your build tree