Removed the broken mmap64 configure check, and moved the
_FILE_OFFSET_BITS define to wine/port.h. Made sure that all files that
need the define include it.

tools/wmc/wmc.c

diff --git a/tools/wmc/wmc.c b/tools/wmc/wmc.c
index 119860c..3c8a771 100644
--- a/tools/wmc/wmc.c
+++ b/tools/wmc/wmc.c
@@ -19,6 +19,7 @@
  */
 
 #include "config.h"
+#include "wine/port.h"
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -279,4 +280,3 @@
 	fflush(stderr);
 	abort();
 }
-