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

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https://hg.mozilla.org/integration/gaia-central/rev/34b65164160e
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #18678 from crdlc/bug-996569

Bug 996569 - Importing FB contacts is soooooooooooooooooooo slow

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https://hg.mozilla.org/integration/gaia-central/rev/bb694fbc2ee6
Author: crdlc <crdlc@tid.es>
Desc: Bug 996569 - Improve performance of FB and other services contacts importation

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "b9d57c835bed4866d2b10f94872ce590dd343640", 
+    "revision": "34b65164160e5bd8c3a4265a3da516d0dd9b11c7", 
     "repo_path": "/integration/gaia-central"
 }