Missing <signal.h>.

git-svn-id: http://www.varnish-cache.org/svn/trunk/varnish-cache@4564 d4fa192b-c00b-0410-8231-f00ffab90ce4

bin/varnishreplay/varnishreplay.c

@@ -40,6 +40,7 @@ SVNID("$Id$")
 #include <fcntl.h>
 #include <pthread.h>
 #include <stdarg.h>
+#include <signal.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>