dwifslpreproc: add missing reorient_fod option
dwifslpreproc: add missing reorient_fod option

Caused mrtransform to fail when the number of se_epi images made it interpretable as SH coefficients (e.g. 6)
MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3,MRtrix3/mrtrix3