Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/34bb6cda673a
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #15461 from Pike/bug-961009-disable-fxa-l10n

bug 961009, stop exposing fxa to l10n until it's done

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https://hg.mozilla.org/integration/gaia-central/rev/da8ebea512f5
Author: Axel Hecht <axel@pike.org>
Desc: bug 961009, stop exposing fxa to l10n until it's done

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "f9b4bd2a4713efa6ffaebdc819ff06e44dfa2779", 
+    "revision": "34bb6cda673afe1b610c2be5611889c38d180b53", 
     "repo_path": "/integration/gaia-central"
 }