fix cross-compile on Cygwin

package/grep/patches/patch-src_system_h

@@ -0,0 +1,18 @@
+--- grep-2.5.4.orig/src/system.h	2009-01-31 06:39:54.000000000 +0100
++++ grep-2.5.4/src/system.h	2010-05-29 00:08:24.703125000 +0200
+@@ -56,6 +56,7 @@ extern char *sys_errlist[];
+ #ifdef __BEOS__
+ # undef O_BINARY /* BeOS 5 has O_BINARY and O_TEXT, but they have no effect. */
+ #endif
++/*
+ #ifdef HAVE_DOS_FILE_CONTENTS
+ # include <io.h>
+ # ifdef HAVE_SETMODE
+@@ -64,6 +65,7 @@ extern char *sys_errlist[];
+ #  define SET_BINARY(fd)  _setmode (fd, O_BINARY)
+ # endif
+ #endif
++*/
+ 
+ #ifdef HAVE_DOS_FILE_NAMES
+ # define IS_SLASH(c) ((c) == '/' || (c) == '\\')