Fix compilation problem on Solaris - missing include

Solaris appears to need #include <sys/wait.h> for WEXITSTATUS to be defined.


git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@3828 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishtest/vtc.c

@@ -36,6 +36,7 @@
 #include <fcntl.h>
 #include <stdlib.h>
 #include <unistd.h>
+#include <sys/wait.h>
 
 #include "libvarnish.h"
 #include "vsb.h"