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

========

https://hg.mozilla.org/integration/gaia-central/rev/13b27bbad88e
Author: gasolin <gasolin@gmail.com>
Desc: Merge pull request #25978 from gasolin/issue-1096147

Bug 1096147 - [uitests] Show API version in Bluetooth panel, r=me

========

https://hg.mozilla.org/integration/gaia-central/rev/8520c4c20941
Author: gasolin <gasolin@gmail.com>
Desc: Bug 1096147 - [uitests] Show API version in Bluetooth panel

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "c8073936975c5035da9189b94f4077e99e538d03", 
+    "revision": "13b27bbad88e4211531a17ddfa3a2a03d1ea11f6", 
     "repo_path": "/integration/gaia-central"
 }