fix build on android

Author: Kethen

Android.mk

@@ -42,6 +42,7 @@ LOCAL_SRC_FILES := \
 	$(wildcard $(LOCAL_PATH)/src/haptic/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/haptic/android/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/haptic/dummy/*.c) \
+	$(wildcard $(LOCAL_PATH)/src/haptic/hidapi/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/hidapi/*.c) \
 	$(wildcard $(LOCAL_PATH)/src/hidapi/android/*.cpp) \
 	$(wildcard $(LOCAL_PATH)/src/joystick/*.c) \