Bumping gaia.json for 1 gaia-central revision(s)

========

https://hg.mozilla.org/integration/gaia-central/rev/3ff317d48348
Author: Rick Waldron <waldron.rick@gmail.com>
Desc: Bug 882751 - Tapping in the center of the clock doesn't work as expected r=ianliu

https://bugzilla.mozilla.org/show_bug.cgi?id=882751

- Reorder digital-clock HTML elements to match analog-clock layout
- Creates explicit object for all timeouts
- Adds `container` to list of lazy init'ed elements
- Removes the unused `this.digitalClockBackground` element
- Consolidates init and initClockface, removes initClockface
- Ensures handleEvent is called with bound handlers
- removes unnecessary nested setTimeout function calls
- Consolidates logic from showAnalogClock, showDigitalClock and show
- Removes showAnalogClock, showDigitalClock
- Defines single pattern for clock face display
- Includes tests for support of Clock.show() and ClockView.handleEvent->show
- Adds mock_alarm_list, mock_asyncstorage
- Ensure that a clock face default always shows, no matter what.
- Request stored clock face mode as early as possible
- Ensure that clock face mode is updated if default doesn't match stored.
- Simplify the clock face rendering tests

Signed-off-by: Rick Waldron <waldron.rick@gmail.com>

b2g/config/gaia.json

@@ -1,4 +1,4 @@
 {
-    "revision": "d60ff6e69bf85e01cbc6b24206e481fd1405a919", 
+    "revision": "3ff317d483485607532c179b70e3ce789ec90662", 
     "repo_path": "/integration/gaia-central"
 }