Add #include <string.h> to mute warning from clang/gcc about implicitly

declaring strcmp(3)

MFC after: 1 month
Reported by: Jenkins
Sponsored by: EMC / Isilon Storage Division

contrib/smbfs/smbutil/print.c

@@ -42,6 +42,7 @@ __FBSDID("$FreeBSD$");
 #include <fcntl.h>
 #include <stdio.h>
 #include <unistd.h>
+#include <string.h>
 #include <strings.h>
 #include <stdlib.h>
 #include <sysexits.h>