Base::FileInfo: fix left overs in transient directory
Base::FileInfo: fix left overs in transient directory

Setting ReadWrite permssion removes executable permission, causing
error when removing directory on Linux.

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