ENH: Port GDCM update script to update-third-party.bash
ENH: Port GDCM update script to update-third-party.bash

Change-Id: Ia24732c618aa6b94d93ee50fea7f256f2dc3773c

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