Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

========

https://hg.mozilla.org/integration/gaia-central/rev/e86094bf04fc
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Revert "Merge pull request #17164 from mcjimenez/bug978785"

This reverts commit 73c3a1305da4a949c1634a009c400bc2431848d2, reversing
changes made to 9f4de77d34987e5e10fdc1abe374937b953af70d.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "branch": "", 
         "revision": ""
     }, 
-    "revision": "16a091f39a57cabdfccc6382a1f72255b159a4ac", 
+    "revision": "e86094bf04fc192a7aa1bad773b6b82e8e355c05", 
     "repo_path": "/integration/gaia-central"
 }