add outputnode in node to hookup for skull stripping report
add outputnode in node to hookup for skull stripping report

oesteban/preprocessing-workflow,poldracklab/fmriprep,oesteban/preprocessing-workflow,poldracklab/fmriprep,chrisfilo/fmriprep,oesteban/fmriprep,poldracklab/preprocessing-workflow,oesteban/fmriprep,shoshber/fmriprep,shoshber/fmriprep,poldracklab/preprocessing-workflow,poldracklab/fmriprep,oesteban/fmriprep