Updated DP script

libraries/build_datapipes.sh

@@ -8,6 +8,9 @@ source ${build_helper_file}
     exit 1
 }
 
+requires_rebuild ${library_path}
+[[ $? -eq 0 ]] && exit 0
+
 if [[ ${build_os_type} != "win32" ]]; then
     cd ${library_path}