BUG#24687 func_misc test fails on win64

- Use same precision (milliseconds) for all time functions
   used  when calculating time for pthread_cond_timedwait
 - Use 'GetSystemTimeAsFileTime' for both start and curr time

server-tools/instance-manager/guardian.cc

@@ -228,9 +228,8 @@ void Guardian_thread::run()
 
       node= node->next;
     }
-    timeout.tv_sec= time(NULL) + monitoring_interval;
-    timeout.tv_nsec= 0;
-
+    set_timespec(timeout, monitoring_interval);
+    
     /* check the loop predicate before sleeping */
     if (!(shutdown_requested && (!(guarded_instances))))
       thread_registry.cond_timedwait(&thread_info, &COND_guardian,

server-tools/instance-manager/instance.cc

@@ -476,10 +476,9 @@ int Instance::stop()
       waitchild= options.shutdown_delay_val;
 
     kill_instance(SIGTERM);
-    /* sleep on condition to wait for SIGCHLD */
 
-    timeout.tv_sec= time(NULL) + waitchild;
-    timeout.tv_nsec= 0;
+    /* sleep on condition to wait for SIGCHLD */
+    set_timespec(timeout, waitchild);
     if (pthread_mutex_lock(&LOCK_instance))
       return ER_STOP_INSTANCE;