scsi_id: include sys/stat.h

I could not build scsi_id because of a missing #include
for sys/stat.h, so I had to add that.

Signed-off-by: Thomas Koeller <thomas@koeller.dyndns.org>

extras/scsi_id/scsi_serial.c

@@ -15,6 +15,7 @@
 
 #include <sys/types.h>
 #include <sys/ioctl.h>
+#include <sys/stat.h>
 #include <stdio.h>
 #include <errno.h>
 #include <string.h>