add findlz4.cmake
add findlz4.cmake

CanalTP/navitia,CanalTP/navitia,CanalTP/navitia,xlqian/navitia,pbougue/navitia,kinnou02/navitia,Tisseo/navitia,kinnou02/navitia,xlqian/navitia,CanalTP/navitia,pbougue/navitia,kinnou02/navitia,pbougue/navitia,xlqian/navitia,CanalTP/navitia,Tisseo/navitia,xlqian/navitia,Tisseo/navitia,pbougue/navitia,Tisseo/navitia,kinnou02/navitia,xlqian/navitia,Tisseo/navitia