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

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https://hg.mozilla.org/integration/gaia-central/rev/552e56f79bba
Author: Dominic Kuo <dominic.kuo@gmail.com>
Desc: Merge pull request #30871 from dominickuo/bug-1181272

Bug 1181272 - [Music] Add README, r=jimporter

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https://hg.mozilla.org/integration/gaia-central/rev/81f9dc07f135
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 1181272 - [Music] Add README

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "f3d7dc02b918f8c9c68d350d5f35b0199b9cd59a", 
+        "git_revision": "1d3595836bd55b70478923d771051268a5dabf91", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "c382629444cb3377663f08de2a331d9673a58aae", 
+    "revision": "552e56f79bba1e2f7cd392361dfb0a8552176be8", 
     "repo_path": "integration/gaia-central"
 }