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

========

https://hg.mozilla.org/integration/gaia-central/rev/49d173267ac5
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23489 from yzen/bug-1030390

Bug 1030390 - improved cards view and taks manager accessibility. r=alive

========

https://hg.mozilla.org/integration/gaia-central/rev/1bc4bf953d23
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1030390 - improved cards view and taks manager accessibility. r=alive

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "51b4fd78db4b2965fbbad20f03140d0ff6cc956d", 
+    "revision": "49d173267ac537d6e1a23036614ea6fd2d29515b", 
     "repo_path": "/integration/gaia-central"
 }