pack vts.tar.gz as part of android-vts.zip (for serving)

Change-Id: I862901432a0e00a97288f6d3245751121fc16ee2
diff --git a/Android.mk b/Android.mk
index a0f530a..720c948 100644
--- a/Android.mk
+++ b/Android.mk
@@ -22,10 +22,12 @@
 
 include $(CLEAR_VARS)
 
-VTS_PYTHON_TGZ := $(HOST_OUT)/vts/vts.tar.gz
+VTS_PYTHON_TGZ := $(HOST_OUT)/vts/android-vts/python/vts.tar.gz
 
 $(VTS_PYTHON_TGZ): test/vts/setup.py
 	@echo "build vts python package: $(VTS_PYTHON_TGZ)"
+	@mkdir -p $(HOST_OUT)/vts
+	@mkdir -p $(HOST_OUT)/vts/android-vts
 	@mkdir -p $(dir $@)
 	$(hide) cd test/vts; python setup.py sdist --formats=gztar
 	$(hide) cp -f test/vts/dist/vts-0.1.tar.gz $@