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

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https://hg.mozilla.org/integration/gaia-central/rev/be086ac51f3b
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Merge pull request #13997 from dominickuo/bug-911108

Bug 911108 - [music] change the hash to mix page when the player is reset by the storages, r=jimporter

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https://hg.mozilla.org/integration/gaia-central/rev/cd99f77a3112
Author: Dominic Kuo <dkuo@mozilla.com>
Desc: Bug 911108 - [music] change the hash to mix page when the player is reset by the storages

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "e70c9c20fac11d49788e21d85d6b54d61eef8738", 
+    "revision": "be086ac51f3b9fd37ec238af79a2f8e624daa790", 
     "repo_path": "/integration/gaia-central"
 }