Issue #96: Remember to track run commands having run once as well

All service/task commands are tracked by the state machine, but run
commands are a bit special since they must run in sequence.  Hence,
we must increment their 'once' counter in service_start() instead.

This should fix the issue mentioned in #96 "took a long time before
the next line" -- because Finit was waiting for udevadm to reach a
once count > 0, which we didn't increment.

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/service.c

@@ -355,6 +355,7 @@ static int service_start(svc_t *svc)
 		result = WEXITSTATUS(complete(svc->cmd, pid));
 		if (!svc_clean_bootstrap(svc)) {
 			svc->start_time = svc->pid = 0;
+			svc->once++;
 			svc_set_state(svc, SVC_STOPPING_STATE);
 		}
 	}