CMake: cmake module path is assumed to be a list
CMake: cmake module path is assumed to be a list

append to it to allow setting it from outside

Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master