Include testutil.hpp if using SETTLE_TIME

Updated:
   tests/test_connect_delay_tipc.cpp
   tests/test_sub_forward_tipc.cpp
   tests/test_term_endpoint_tipc.cpp

tests/test_connect_delay_tipc.cpp

@@ -27,6 +27,8 @@
 #undef NDEBUG
 #include <assert.h>
 
+#include "testutil.hpp"
+
 int main (void)
 {
     int val;

tests/test_sub_forward_tipc.cpp

@@ -26,6 +26,8 @@
 #undef NDEBUG
 #include <assert.h>
 
+#include "testutil.hpp"
+
 int main (void)
 {
     fprintf (stderr, "test_sub_forward running...\n");

tests/test_term_endpoint_tipc.cpp

@@ -27,6 +27,8 @@
 #undef NDEBUG
 #include <assert.h>
 
+#include "testutil.hpp"
+
 int main (void)
 {
     int rc;