BUG: Add DCMTK external project dependency after ExternalProject_Add
BUG: Add DCMTK external project dependency after ExternalProject_Add

Call add_dependencies with DCMTK_EPNAME after the target gets defined with
ExternalProject_Add(${DCMTK_EPNAME}.

Change-Id: Ibdc8ffa6ad35ce51228ad0a9ed2cafe2b48067ce

spinicist/ITK,malaterre/ITK,malaterre/ITK,hjmjohnson/ITK,stnava/ITK,thewtex/ITK,spinicist/ITK,thewtex/ITK,LucasGandel/ITK,Kitware/ITK,stnava/ITK,spinicist/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK,vfonov/ITK,malaterre/ITK,blowekamp/ITK,malaterre/ITK,richardbeare/ITK,thewtex/ITK,vfonov/ITK,stnava/ITK,malaterre/ITK,malaterre/ITK,vfonov/ITK,hjmjohnson/ITK,LucasGandel/ITK,hjmjohnson/ITK,fbudin69500/ITK,InsightSoftwareConsortium/ITK,malaterre/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,fbudin69500/ITK,blowekamp/ITK,vfonov/ITK,blowekamp/ITK,BRAINSia/ITK,stnava/ITK,BRAINSia/ITK,LucasGandel/ITK,blowekamp/ITK,thewtex/ITK,blowekamp/ITK,fbudin69500/ITK,malaterre/ITK,fbudin69500/ITK,spinicist/ITK,stnava/ITK,fbudin69500/ITK,BRAINSia/ITK,malaterre/ITK,InsightSoftwareConsortium/ITK,vfonov/ITK,hjmjohnson/ITK,richardbeare/ITK,stnava/ITK,hjmjohnson/ITK,stnava/ITK,blowekamp/ITK,BRAINSia/ITK,richardbeare/ITK,spinicist/ITK,Kitware/ITK,InsightSoftwareConsortium/ITK,vfonov/ITK,fbudin69500/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,Kitware/ITK,Kitware/ITK,LucasGandel/ITK,spinicist/ITK,hjmjohnson/ITK,blowekamp/ITK,stnava/ITK,spinicist/ITK,thewtex/ITK,thewtex/ITK,vfonov/ITK,richardbeare/ITK,fbudin69500/ITK,Kitware/ITK,vfonov/ITK,richardbeare/ITK,BRAINSia/ITK,thewtex/ITK,richardbeare/ITK,LucasGandel/ITK,stnava/ITK,LucasGandel/ITK,LucasGandel/ITK,hjmjohnson/ITK,Kitware/ITK,spinicist/ITK,richardbeare/ITK,fbudin69500/ITK,blowekamp/ITK,BRAINSia/ITK,LucasGandel/ITK,Kitware/ITK,vfonov/ITK