Fix Jira 680 LED and LED Central sketches need some work

1. Add a delay to make sure profile register process success.
    The UART send too fast may makes the profile registration failed.

Author: sgbihu

libraries/CurieBLE/src/BLEPeripheralRole.cpp

@@ -69,9 +69,10 @@ bool BLEPeripheralRole::begin()
 
     // Set device name    
     setDeviceName();
+	delay(4);
     // Register profile
     _peripheral.registerProfile();
-    delay(4); // Temp solution for send data fast will makes ADV data set failed
+    delay(8); // Temp solution for send data fast will makes ADV data set failed
     return true;
 }