Bumping gaia.json for 2 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/fb34bf4d3541
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #11351 from jmcanterafonseca/fix_link_img

Bug 901512 - [Contacts] Unable to finish the linking process when there ...

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https://hg.mozilla.org/integration/gaia-central/rev/5054f99b4768
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 901512 - [Contacts] Unable to finish the linking process when there has been an error while retrieving the picture of FB contact

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "b092e1f99db90c13c6ce89fd6bc80ebd859f1b40", 
+    "revision": "fb34bf4d35419fe1367f5df610b216af11fd593e", 
     "repo_path": "/integration/gaia-central"
 }