o add snes fatfs dummy

o add fatfs custom chip to bsnes
o finishes fatfs linux backend smaple

tools/bsnes/chip/fatfs/integer.h

@@ -0,0 +1,37 @@
+/*-------------------------------------------*/
+/* Integer type definitions for FatFs module */
+/*-------------------------------------------*/
+
+#ifndef _INTEGER
+
+#if 0
+#include <windows.h>
+#else
+
+/* These types must be 16-bit, 32-bit or larger integer */
+typedef int				INT;
+typedef unsigned int	UINT;
+
+/* These types must be 8-bit integer */
+typedef signed char		CHAR;
+typedef unsigned char	UCHAR;
+typedef unsigned char	BYTE;
+
+/* These types must be 16-bit integer */
+typedef short			SHORT;
+typedef unsigned short	USHORT;
+typedef unsigned short	WORD;
+typedef unsigned short	WCHAR;
+
+/* These types must be 32-bit integer */
+typedef long			LONG;
+typedef unsigned long	ULONG;
+typedef unsigned long	DWORD;
+
+/* Boolean type */
+typedef enum { FALSE = 0, TRUE } BOOL;
+
+#endif
+
+#define _INTEGER
+#endif