Please give back gdcm

[Mathieu Malaterre <mathieu.malaterre@gmail.com>]

vtk 5.8.0-5 does fix #650935 (introduced in vtk 5.8.0-4 see 650025).
So please give back gdcm on all arch:

gb gdcm_2.0.18-6 . ALL . -m 'Rebuild against fixed vtk, see #650025'

Thanks
-- 
Mathieu