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

========

https://hg.mozilla.org/integration/gaia-central/rev/58fe6b7c3ae4
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #19492 from jrburke/bug1010867-email-slow-down-there-buddy

Bug 1010867 - [OPENC_1.3][email/UI] Message notification handling is pushing message_reader onto the stack twice r=asuth

========

https://hg.mozilla.org/integration/gaia-central/rev/ebe506ff8c45
Author: jrburke <jrburke@gmail.com>
Desc: Bug 1010867 - [OPENC_1.3][email/UI] Message notification handling is pushing message_reader onto the stack twice

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "f8c2f092306fdb4bc633987f446d8f4fd878bf11", 
+    "revision": "58fe6b7c3ae4a47176bcb64ee1e2b162906827c5", 
     "repo_path": "/integration/gaia-central"
 }