Changes the include path separator for Windows builds to use "/" instead
of "\". Windows has no problems with using a forward slash as a path
separator, but using a backslash causes problems when attempting to
cross compile for other platforms (for example, when trying to cross
compile for MinGW from Linux).
#if BZ_LCCWIN32
# include <io.h>
# include <fcntl.h>
-# include <sys\stat.h>
+# include <sys/stat.h>
# define NORETURN /**/
# define PATH_SEP '\\'