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

========

https://hg.mozilla.org/integration/gaia-central/rev/ab17d9bc0fed
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Revert "Bug 1181201 - Reenable the tutorial unit test"

This reverts commit 3393d9d46772920d605e531d61010e2768342a11.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "b0791fe2b9dc1f6542e9e2ea42fa990cea7e2128", 
+        "git_revision": "1f98c478b0991465ff7e86e8664f017b82db2514", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "4aef09435858b3ed3b9577fecb1fe639b358cd67", 
+    "revision": "ab17d9bc0fedc7b1499d86f4486eca5c506667fe", 
     "repo_path": "integration/gaia-central"
 }