Adding timeout for press button of 15 secs.

Signed-off-by: Pol Henarejos <pol.henarejos@cttc.es>

src/ccid/ccid2040.h

@@ -88,6 +88,7 @@ struct apdu {
 #define EV_CMD_AVAILABLE          4
 #define EV_EXIT                   8
 #define EV_BUTTON_PRESSED        16
+#define EV_BUTTON_TIMEOUT        32
 
 //Variables set by core1
 extern queue_t *ccid_comm;