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

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https://hg.mozilla.org/integration/gaia-central/rev/fda48b5513b7
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #31990 from gasolin/issue-1207308

Bug 1207308 - navigate to homescreens-list, r=cwiiis

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https://hg.mozilla.org/integration/gaia-central/rev/bf33bf292114
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1207308 - navigate to homescreens-list, r=clord

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "2b52997c9de3122f4fb846621b5eb9b929a062d1", 
+        "git_revision": "9539d6040f797bba8f7fe8dfd91d569e7b5ba821", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "f81f9f60ea2ae0d7a4d17967b222a2d92f5c9528", 
+    "revision": "fda48b5513b7d0483217c430cee15a2b3194013e", 
     "repo_path": "integration/gaia-central"
 }