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

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https://hg.mozilla.org/integration/gaia-central/rev/5536bc8309cc
Author: autolander <bug.autolander@gmail.com>
Desc: Bug 1163679 - merge pull request #30010 from hfiguiere:bug1163679-scrolling to mozilla-b2g:master

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https://hg.mozilla.org/integration/gaia-central/rev/5349e9fb72d1
Author: Hubert Figuière <hub@figuiere.net>
Desc: Bug 1163679 - Remove the -moz-crisp-edge anti optimization

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f0fc93d9b3db93c4fd0b6062366e3b1ec4349d25", 
+        "git_revision": "8592b14dfe5d7e66b0deff62aa99f93c79f2baaf", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "59c8c8c8138d387b70646ee98b0fa94170c876fa", 
+    "revision": "5536bc8309cc5701b0388b3f738dbca222e73d09", 
     "repo_path": "integration/gaia-central"
 }