Add winsupport from hecl

include/kabufuda/winsupport.hpp

@@ -0,0 +1,14 @@
+#ifndef _HECL_WINSUPPORT_H_
+#define _HECL_WINSUPPORT_H_
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN 1
+#endif
+#ifndef NOMINMAX
+#define NOMINMAX 1
+#endif
+#include "windows.h"
+
+void* memmem(const void *haystack, size_t hlen, const void *needle, size_t nlen);
+
+#endif // _HECL_WINSUPPORT_H_