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

========

https://hg.mozilla.org/integration/gaia-central/rev/7e89bbbc62c3
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #24139 from gmarty/Bug-1068204-Utility-Tray-Cannot-swipe-left-dismiss-notifications

Bug 1068204 - [Utility Tray] Cannot swipe left to dismiss notifications

========

https://hg.mozilla.org/integration/gaia-central/rev/898752e20bc2
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1068204 - [Utility Tray] Cannot swipe left to dismiss notifications

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "92dc9ad295b801f00f17d18a2b1b275f4ef24413", 
+    "revision": "7e89bbbc62c3d969ff86cb6a202bee0883bdb88d", 
     "repo_path": "/integration/gaia-central"
 }