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

========

https://hg.mozilla.org/integration/gaia-central/rev/5a2bd8b7aa5d
Author: Yura Zenevich <yura.zenevich@gmail.com>
Desc: Merge pull request #23873 from yzen/bug-1045017

Bug 1045017 - fixing screen reader status bar accessibility. Statusbar i...

========

https://hg.mozilla.org/integration/gaia-central/rev/5abf8540f6a3
Author: Yura Zenevich <yzenevich@mozilla.com>
Desc: Bug 1045017 - fixing screen reader status bar accessibility. Statusbar improvements during app transitions.

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "9a608c49a2ef84d54a8d695e505fa98b28571342", 
+    "revision": "5a2bd8b7aa5db2be3d87c06c8d785c5367ad4f0a", 
     "repo_path": "/integration/gaia-central"
 }