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

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https://hg.mozilla.org/integration/gaia-central/rev/6a9b9c1434e8
Author: Martijn <martijn.martijn@gmail.com>
Desc: Merge pull request #29455 from mwargers/test_container.css

Bug 970728 - Intermittent test_bug344861.html -  test_container.css fix

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https://hg.mozilla.org/integration/gaia-central/rev/da82eee77d0c
Author: Martijn Wargers <mwargers@mozilla.com>
Desc: Bug 970728 - Intermittent test_bug344861.html -  test_container.css fix

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "2b301bea50403858c35d7e93c290ede67d5fb09f", 
+        "git_revision": "be1a3183dc6027eddf16256f46513314f291c2cf", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "def153137ebbebe1b58c8574800aa31d98136865", 
+    "revision": "6a9b9c1434e82c617a361f8b4a2c0b823603fd83", 
     "repo_path": "integration/gaia-central"
 }