rectify build files.

Change-Id: I138ac7805cb045f960e32193bad95a73cd8b063e
diff --git a/Android.mk b/Android.mk
index 844f052..980d0e2 100644
--- a/Android.mk
+++ b/Android.mk
@@ -35,6 +35,6 @@
 
 include $(BUILD_PACKAGE)
 
-include $(call all-subdir-makefiles)
+include $(call all-makefiles-under,$(LOCAL_PATH))
 
 endif