Move XDK cache generation Python script into the VSIX related packing directory.

LUFA/StudioIntegration/makefile

@@ -68,7 +68,7 @@ generate_vsix: $(EXTENSION_OUTPUT_XML) $(MODULE_OUTPUT_XML)
 	@echo "Generating ASF cache files..."
 	@rm -f $(LUFA_ROOT)/../content.xml.cache
 	@rm -f $(LUFA_ROOT)/../ExampleProjects.xml
-	@python generate_caches.py $(LUFA_ROOT)/../
+	@python VSIX/generate_caches.py $(LUFA_ROOT)/../
 
 	@echo "Archiving Content..."
 	@rm -f contents.zip