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

========

https://hg.mozilla.org/integration/gaia-central/rev/5da080cfc243
Author: James Burke <jrburke@gmail.com>
Desc: Merge pull request #18671 from jrburke/bug796474-email-virtual-scroll-slim

Bug 796474 - [email] quasi-infinite scroll may hitch under OMTC r=asuth

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https://hg.mozilla.org/integration/gaia-central/rev/1e0c42880d38
Author: jrburke <jrburke@gmail.com>
Desc: Bug 796474 - [email] quasi-infinite scroll may hitch under OMTC; consider using absolute positioning with virtual coordinate space

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "12a84f6ff7be24dab4ba5fb97ef419a9b5c825ee", 
+    "revision": "5da080cfc24377a4cc8a3fd0ad3c621d49b97469", 
     "repo_path": "/integration/gaia-central"
 }