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

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https://hg.mozilla.org/integration/gaia-central/rev/1833efbe5d54
Author: Alive.Kuo <alegnadise@gmail.com>
Desc: Merge pull request #23937 from alivedise/bugzilla/1055299_master/v4

Bug 1055299: Ignore continuous app launch request in homescreen side and...r=kgrandon

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https://hg.mozilla.org/integration/gaia-central/rev/47e309ae1c7a
Author: Alive Kuo <alegnadise@gmail.com>
Desc: Bug 1055299: Ignore continuous app launch request in homescreen side and send homescreen to background while rocketbar is open in system side

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "fe4e8987f49a680a5fbf22dd67fbbd1d96dd4dfe", 
+    "revision": "1833efbe5d54167f13f469f112e1ed8136ce923c", 
     "repo_path": "/integration/gaia-central"
 }