test: add a 10ms delay for scrolling tests

No touchpad gives us these events with a 0 delay, so let's not test for that.

This is required for adding timing-sensitive scroll code, see
https://gitlab.freedesktop.org/libinput/libinput/issues/101.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>

test/test-touchpad.c

@@ -124,7 +124,7 @@ test_2fg_scroll(struct litest_device *dev, double dx, double dy, bool want_sleep
 	litest_touch_down(dev, 0, 49, 50);
 	litest_touch_down(dev, 1, 51, 50);
 
-	litest_touch_move_two_touches(dev, 49, 50, 51, 50, dx, dy, 10, 0);
+	litest_touch_move_two_touches(dev, 49, 50, 51, 50, dx, dy, 10, 10);
 
 	/* Avoid a small scroll being seen as a tap */
 	if (want_sleep) {