system/flashtool.cpp: add bad block skip for read/write/erase in case of NAND

Origin commit data
------------------
Commit: e739868e7c
Author: [CST] Focus <focus.cst@gmail.com>
Date: 2013-01-29 (Tue, 29 Jan 2013)

src/system/flashtool.h

@@ -37,7 +37,7 @@
 
 #include <string>
 #include <vector>
-
+#include <mtd/mtd-user.h>
 
 class CFlashTool
 {
@@ -47,6 +47,11 @@ class CFlashTool
 		std::string mtdDevice;
 		std::string ErrorMessage;
 
+		int fd;
+		mtd_info_t meminfo;
+		bool isnand;
+
+		bool getInfo();
 		bool erase(int globalProgressEnd=-1);
 
 	public: