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

========

https://hg.mozilla.org/integration/gaia-central/rev/cf33bfa7452a
Author: Yuren Ju <yurenju@gmail.com>
Desc: Revert "Bug 897352 - [gaia build system] Transition to a build_stage for assembling apps"

This reverts commit 8126421998f0e1b0bf618f6788db7eabb26be0b8.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "55563cf01c3ba2ce61ce1fb89997fae6580ac4dd", 
+    "revision": "cf33bfa7452a7a039af94aac310cac31c815e26f", 
     "repo_path": "/integration/gaia-central"
 }