avoid "Argument list too long" in egs/swbd/local/swbd_data_prep.sh running on Mac OSX
avoid "Argument list too long" in egs/swbd/local/swbd_data_prep.sh running on Mac OSX

chris920820/pocolm,wantee/pocolm,wantee/pocolm,chris920820/pocolm,chris920820/pocolm,keli78/pocolm,wantee/pocolm,wantee/pocolm,keli78/pocolm,keli78/pocolm,keli78/pocolm,chris920820/pocolm