Adhoc fix compile error of usb_usb

protocol/usb_hid/arduino-1.0.1/cores/arduino/WString.h

@@ -35,7 +35,7 @@
 //     -std=c++0x
 
 class __FlashStringHelper;
-#define F(string_literal) (reinterpret_cast<__FlashStringHelper *>(PSTR(string_literal)))
+#define F(string_literal) (reinterpret_cast<const __FlashStringHelper *>(PSTR(string_literal)))
 
 // An inherited class for holding the result of a concatenation.  These
 // result objects are assumed to be writable by subsequent concatenations.

protocol/usb_hid/override_wiring.c

@@ -1,6 +1,7 @@
 /*
  * To keep Timer0 for common/timer.c override arduino/wiring.c.
  */
+#define __DELAY_BACKWARD_COMPATIBLE__
 #include <util/delay.h>
 #include "common/timer.h"
 #include "Arduino.h"

protocol/usb_hid/parser.cpp

@@ -1,5 +1,3 @@
-#include <cstring.h>
-
 #include "parser.h"
 #include "usb_hid.h"