Add haptic feedback

Change-Id: I15d723f73c0b0bb4a40645d1c3f4c1c616f36998
diff --git a/minuitwrp/minui.h b/minuitwrp/minui.h
index 03e15bb..5f02d4a 100644
--- a/minuitwrp/minui.h
+++ b/minuitwrp/minui.h
@@ -70,4 +70,6 @@
 void ev_dispatch(void);
 int ev_get_input(int fd, short revents, struct input_event *ev);
 
+int vibrate(int timeout_ms);
+
 #endif