mruby-dir/dirtest.c: add compatibility macro for `getcwd`
@@ -22,6 +22,7 @@ int closedir(DIR *dir);
#endif
#include <direct.h>
#define rmdir(path) _rmdir(path)
+#define getcwd(path,len) _getcwd(path,len)
#define mkdir(path,mode) _mkdir(path)
#define chdir(path) _chdir(path)
#else
