Bumping gaia.json for 3 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/3dba1d8c3f85
Author: Hubert Figuière <hub@figuiere.net>
Desc: Merge pull request #31233 from hfiguiere/bug1157782-shuffle-test

Bug 1157782 - Fix the shuffle test to make it more robust. r=squib

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https://hg.mozilla.org/integration/gaia-central/rev/32ac7a531130
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1157782 - Make all the test files a 10sec blank so that we have time to stuff

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https://hg.mozilla.org/integration/gaia-central/rev/af8ce7bd2295
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1157782 - Fix the shuffle test to make it more robust.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "bfc77a7b8854484317a781581c87fc26da92809b", 
+        "git_revision": "13ed13e061bd4f20de47c196469a63706fe866a7", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "3483948f81ab51dbf191325815b29d070f761577", 
+    "revision": "3dba1d8c3f85d4b50b01387a99e8b7f643de2379", 
     "repo_path": "integration/gaia-central"
 }