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

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https://hg.mozilla.org/integration/gaia-central/rev/5ec7add1a5ed
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #30525 from wilsonpage/1054239

Bug 1054239 - [system][notifications-tray] Swiping up anywhere on the open tray should close

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https://hg.mozilla.org/integration/gaia-central/rev/ffd898f3e93d
Author: Wilson Page <wilsonpage@me.com>
Desc: Bug 1054239 - [system][notifications-tray] Swiping up anywhere on the open tray should close

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "3a14891fb02627fe9a39f11b8dfa6aeca9d9ee91", 
+        "git_revision": "21256d7665f972255d198f8af81a8df4bd0e0fc4", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "336c112c4edf6789043867309570837a6b739cf5", 
+    "revision": "5ec7add1a5ed54e7c57e9fd24704624a9e84139a", 
     "repo_path": "integration/gaia-central"
 }