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

========

https://hg.mozilla.org/integration/gaia-central/rev/ab0d6e1927a4
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #13399 from crdlc/bug-935077

Bug 935070 - [Download Manager] New shared component DownloadUI

========

https://hg.mozilla.org/integration/gaia-central/rev/8f978d90a82f
Author: crdlc <crdlc@tid.es>
Desc: Bug 935070 - [Download Manager] New shared component DownloadUI

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "2a0c0531f4c6e3f55d7534cb6a9408efceb4cb8f", 
+    "revision": "ab0d6e1927a4fbce5d171555044557c1b7ba25c3", 
     "repo_path": "/integration/gaia-central"
 }