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

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https://hg.mozilla.org/integration/gaia-central/rev/93b6be5e33f6
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Merge pull request #22003 from jaoo/1038749

Bug 1038749 - [B2G][Audio Channel]After playing sound through front speaker, all sound will play through front speaker instead of speakerphone. r=etienne

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https://hg.mozilla.org/integration/gaia-central/rev/86c6a4d5f462
Author: Jose Antonio Olivera Ortega <josea.olivera@gmail.com>
Desc: Bug 1038749 - [B2G][Audio Channel]After playing sound through front speaker, all sound will play through front speaker instead of speakerphone

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "d6a0f6acfa82447b47747042de9aadef7dc56f81", 
+    "revision": "93b6be5e33f66a6c949bba3d3ee291f0078831ee", 
     "repo_path": "/integration/gaia-central"
 }