Add UsbDebugInfo to aid future debugging via USB.

right/src/usb_protocol_handler.h

@@ -41,6 +41,10 @@
         JumpToBootloaderError_InvalidModuleDriverId = 1,
     } jump_to_bootloader_error_t;
 
+// Variables:
+
+    extern uint8_t UsbDebugInfo[USB_GENERIC_HID_OUT_BUFFER_LENGTH];
+
 // Functions:
 
     void UsbProtocolHandler(void);