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

========

https://hg.mozilla.org/integration/gaia-central/rev/be77dd251d87
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: Merge pull request #16372 from arcturus/bug-969293

[FTE] In FTE, when PIN is inserted, I can't see "Cellular data" screen instead i see "Select a network" screen

========

https://hg.mozilla.org/integration/gaia-central/rev/fff74cfe0664
Author: Francisco Jordano <arcturus@ardeenelinfierno.com>
Desc: [FTE] In FTE, when PIN is inserted, I can't see "Cellular data" screen instead i see "Select a network" screen

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "47d8fb57fed6ab63b1cf1b17bfed5ac0a4729b1d", 
+    "revision": "be77dd251d873714642c97df323bff63211dfdbe", 
     "repo_path": "/integration/gaia-central"
 }