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

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https://hg.mozilla.org/integration/gaia-central/rev/dbd05f0dba99
Author: Jim Porter <jporter@mozilla.com>
Desc: Merge pull request #31796 from jimporter/music-nga-metadata-docs

Bug 1203822 - [music][nga] Provide metadata documentation

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https://hg.mozilla.org/integration/gaia-central/rev/42d73264dc06
Author: Jim <jporter@mozilla.com>
Desc: Bug 1203822 - [music][nga] Provide metadata documentation

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "25fd808f6ce2d8582077efc17feed8dba7dd4424", 
+        "git_revision": "cc2e6946bbc29c7eb4ca7b5ba6a6adcddfdc0f95", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "6bf63f9dca3d3e54dc6789d8dd09fcc87a50fa6b", 
+    "revision": "dbd05f0dba99bf3f05ca8733578d1c70ddf167ee", 
     "repo_path": "integration/gaia-central"
 }