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

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https://hg.mozilla.org/integration/gaia-central/rev/9c80e796d129
Author: Jim Porter <jporter@mozilla.com>
Desc: Merge pull request #32710 from jimporter/music-external-filename

Bug 896173 - [Music - MMS ] mp3 and amr files received via MMS doesn'…

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https://hg.mozilla.org/integration/gaia-central/rev/d0b196553ca8
Author: Jim <jporter@mozilla.com>
Desc: Bug 896173 - [Music - MMS ] mp3 and amr files received via MMS doesn't show the original filename

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "b860e1b764618775adae82f2e0256aaa37581f73", 
+        "git_revision": "a129e5fb047d99f1810827cbf8bd09b95011bf57", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "50b46f18355e66817587450e23cedb26e3b43d64", 
+    "revision": "9c80e796d129f062748b0aae03df23b9bbf48921", 
     "repo_path": "integration/gaia-central"
 }