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

========

https://hg.mozilla.org/integration/gaia-central/rev/679eab6303d8
Author: EragonJ <eragonj@eragonj.me>
Desc: bug 932731 - [DSDS][Gaia][Sim Manager] can set outgoing call, msg and data

========

https://hg.mozilla.org/integration/gaia-central/rev/f70332a1be1a
Author: Julien Wajsberg <felash@gmail.com>
Desc: Revert "Merge pull request #13283 from EragonJ/bug-932731"

This reverts commit 9e0df13811b577026b70ccfdcd9b4a309746e8ba, reversing
changes made to 13e51d5f543729bb38cdd054d6452bf3f3e611ae.

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "22ae719385f4de71206cbbb52d361b1295c46e8b", 
+    "revision": "679eab6303d874b903e9e088d865dc61f57877d4", 
     "repo_path": "/integration/gaia-central"
 }