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

========

https://hg.mozilla.org/integration/gaia-central/rev/3f869bcf3bbf
Author: Florin Strugariu <florin.strugariu@softvision.ro>
Desc: Merge pull request #27127 from eeejay/bug-1068983

Bug 1068983 - Hide adjacent frames from screen reader.

========

https://hg.mozilla.org/integration/gaia-central/rev/f23c17270fce
Author: Eitan Isaacson <eitan@monotonous.org>
Desc: Bug 1068983 - Hide adjacent frames from screen reader.

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "cfbd3f0eabd67d828d940d2338dc9504b489b5ec", 
+        "git_revision": "e91cdb71d55e29bf41cca768591db64785d63801", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "26ef2cc0e92df2472d3823f26ebc0530265690c4", 
+    "revision": "3f869bcf3bbf485934de1539379d87b1cb71dcf3", 
     "repo_path": "integration/gaia-central"
 }