Only read 5 values, then return

src/examples/px4_simple_app/px4_simple_app.c

@@ -71,7 +71,7 @@ int px4_simple_app_main(int argc, char *argv[])
 
 	int error_counter = 0;
 
-	while (true) {
+	for (int i = 0; i < 5; i++) {
 		/* wait for sensor update of 1 file descriptor for 1000 ms (1 second) */
 		int poll_ret = poll(fds, 1, 1000);