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

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https://hg.mozilla.org/integration/gaia-central/rev/89edada6163b
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Revert "Revert "Revert "Bug 1178241 - [vCard] 'undefined' is displayed when a field exist but there's no value in it r=borjasalguero"""

This reverts commit 148b69dc19a9a26b854675d60808408bc4982e59.

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https://hg.mozilla.org/integration/gaia-central/rev/05a9ba44627f
Author: Francisco Jordano <fjordano@mozilla.com>
Desc: Revert "Revert "Bug 1178241 - [vCard] 'undefined' is displayed when a field exist but there's no value in it r=borjasalguero""

This reverts commit 5afb1cfdfdc9d6c62f5c1d690621ba3d07561e15.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "6bccb1e1d4713b4e7e45779a759a8c9a70ffaeb9", 
+        "git_revision": "fa22505e0cb913c170698d7e5cb819e31e5c4d69", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "e3a7d67a538d8c992d82c7787a8080f46f1ac73b", 
+    "revision": "89edada6163bab20c3dc8e61f3e73c88af7e08ae", 
     "repo_path": "integration/gaia-central"
 }