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

========

https://hg.mozilla.org/integration/gaia-central/rev/8a69414eaca6
Author: KWierso <kwierso@gmail.com>
Desc: Revert "Merge pull request #25420 from gaye/bug-821604" for Gu test failures

This reverts commit 3b98c6a903e79ea16a51832fa4be23f817ab5829, reversing
changes made to 4ee0a68bc71b00808313b21ebd7c3b6a60e98d14.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "cff0262dcdc3320f7d0431943f20c4be6b1e6700", 
+    "revision": "8a69414eaca65cef8e2491e56fef47bf0e069f9c", 
     "repo_path": "/integration/gaia-central"
 }