ENH: modification to make ITK compiles with system GDCM.
ENH: modification to make ITK compiles with system GDCM.

Change-Id: I61f5a3f7dd56a12c254e2d5fc42be2de97014076

richardbeare/ITK,rhgong/itk-with-dom,cpatrick/ITK-RemoteIO,zachary-williamson/ITK,richardbeare/ITK,PlutoniumHeart/ITK,richardbeare/ITK,thewtex/ITK,atsnyder/ITK,rhgong/itk-with-dom,malaterre/ITK,jcfr/ITK,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,spinicist/ITK,jcfr/ITK,biotrump/ITK,LucHermitte/ITK,hendradarwin/ITK,vfonov/ITK,InsightSoftwareConsortium/ITK,LucHermitte/ITK,hendradarwin/ITK,biotrump/ITK,BlueBrain/ITK,biotrump/ITK,fuentesdt/InsightToolkit-dev,zachary-williamson/ITK,stnava/ITK,rhgong/itk-with-dom,eile/ITK,vfonov/ITK,thewtex/ITK,BlueBrain/ITK,cpatrick/ITK-RemoteIO,thewtex/ITK,msmolens/ITK,jcfr/ITK,fedral/ITK,hendradarwin/ITK,hjmjohnson/ITK,BRAINSia/ITK,hinerm/ITK,hendradarwin/ITK,paulnovo/ITK,fbudin69500/ITK,hendradarwin/ITK,CapeDrew/DCMTK-ITK,biotrump/ITK,spinicist/ITK,CapeDrew/DCMTK-ITK,fbudin69500/ITK,Kitware/ITK,stnava/ITK,cpatrick/ITK-RemoteIO,PlutoniumHeart/ITK,heimdali/ITK,blowekamp/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,spinicist/ITK,richardbeare/ITK,LucHermitte/ITK,heimdali/ITK,vfonov/ITK,BRAINSia/ITK,LucasGandel/ITK,heimdali/ITK,fbudin69500/ITK,richardbeare/ITK,hinerm/ITK,atsnyder/ITK,heimdali/ITK,eile/ITK,blowekamp/ITK,LucasGandel/ITK,blowekamp/ITK,jmerkow/ITK,eile/ITK,malaterre/ITK,stnava/ITK,GEHC-Surgery/ITK,hendradarwin/ITK,BRAINSia/ITK,spinicist/ITK,LucasGandel/ITK,hinerm/ITK,vfonov/ITK,jmerkow/ITK,malaterre/ITK,rhgong/itk-with-dom,jcfr/ITK,msmolens/ITK,BlueBrain/ITK,hinerm/ITK,biotrump/ITK,heimdali/ITK,thewtex/ITK,BRAINSia/ITK,Kitware/ITK,jcfr/ITK,cpatrick/ITK-RemoteIO,hjmjohnson/ITK,LucasGandel/ITK,hendradarwin/ITK,cpatrick/ITK-RemoteIO,zachary-williamson/ITK,hinerm/ITK,stnava/ITK,fedral/ITK,hinerm/ITK,GEHC-Surgery/ITK,fbudin69500/ITK,fuentesdt/InsightToolkit-dev,itkvideo/ITK,richardbeare/ITK,msmolens/ITK,stnava/ITK,LucasGandel/ITK,atsnyder/ITK,jcfr/ITK,jcfr/ITK,hinerm/ITK,LucHermitte/ITK,itkvideo/ITK,itkvideo/ITK,fedral/ITK,msmolens/ITK,malaterre/ITK,itkvideo/ITK,ajjl/ITK,thewtex/ITK,fuentesdt/InsightToolkit-dev,LucasGandel/ITK,blowekamp/ITK,Kitware/ITK,fbudin69500/ITK,jmerkow/ITK,LucHermitte/ITK,zachary-williamson/ITK,CapeDrew/DCMTK-ITK,InsightSoftwareConsortium/ITK,PlutoniumHeart/ITK,paulnovo/ITK,PlutoniumHeart/ITK,CapeDrew/DCMTK-ITK,fuentesdt/InsightToolkit-dev,atsnyder/ITK,PlutoniumHeart/ITK,atsnyder/ITK,hjmjohnson/ITK,LucHermitte/ITK,fbudin69500/ITK,Kitware/ITK,hjmjohnson/ITK,fuentesdt/InsightToolkit-dev,fedral/ITK,itkvideo/ITK,InsightSoftwareConsortium/ITK,GEHC-Surgery/ITK,BRAINSia/ITK,fedral/ITK,BlueBrain/ITK,jmerkow/ITK,atsnyder/ITK,vfonov/ITK,cpatrick/ITK-RemoteIO,hjmjohnson/ITK,stnava/ITK,fbudin69500/ITK,eile/ITK,heimdali/ITK,LucHermitte/ITK,itkvideo/ITK,GEHC-Surgery/ITK,eile/ITK,GEHC-Surgery/ITK,ajjl/ITK,GEHC-Surgery/ITK,PlutoniumHeart/ITK,rhgong/itk-with-dom,paulnovo/ITK,ajjl/ITK,fedral/ITK,jmerkow/ITK,ajjl/ITK,itkvideo/ITK,ajjl/ITK,vfonov/ITK,rhgong/itk-with-dom,fuentesdt/InsightToolkit-dev,Kitware/ITK,thewtex/ITK,jmerkow/ITK,Kitware/ITK,jmerkow/ITK,richardbeare/ITK,vfonov/ITK,LucHermitte/ITK,BlueBrain/ITK,malaterre/ITK,fbudin69500/ITK,blowekamp/ITK,hinerm/ITK,BRAINSia/ITK,fuentesdt/InsightToolkit-dev,LucasGandel/ITK,cpatrick/ITK-RemoteIO,zachary-williamson/ITK,biotrump/ITK,hinerm/ITK,fedral/ITK,rhgong/itk-with-dom,vfonov/ITK,jcfr/ITK,GEHC-Surgery/ITK,eile/ITK,CapeDrew/DCMTK-ITK,vfonov/ITK,eile/ITK,ajjl/ITK,BlueBrain/ITK,BlueBrain/ITK,zachary-williamson/ITK,spinicist/ITK,InsightSoftwareConsortium/ITK,CapeDrew/DCMTK-ITK,CapeDrew/DCMTK-ITK,paulnovo/ITK,eile/ITK,fuentesdt/InsightToolkit-dev,stnava/ITK,hjmjohnson/ITK,hjmjohnson/ITK,msmolens/ITK,PlutoniumHeart/ITK,malaterre/ITK,atsnyder/ITK,msmolens/ITK,heimdali/ITK,spinicist/ITK,rhgong/itk-with-dom,stnava/ITK,jmerkow/ITK,biotrump/ITK,spinicist/ITK,zachary-williamson/ITK,ajjl/ITK,thewtex/ITK,blowekamp/ITK,paulnovo/ITK,PlutoniumHeart/ITK,fedral/ITK,paulnovo/ITK,itkvideo/ITK,malaterre/ITK,atsnyder/ITK,Kitware/ITK,biotrump/ITK,paulnovo/ITK,BlueBrain/ITK,stnava/ITK,InsightSoftwareConsortium/ITK,InsightSoftwareConsortium/ITK,itkvideo/ITK,GEHC-Surgery/ITK,malaterre/ITK,ajjl/ITK,hendradarwin/ITK,msmolens/ITK,blowekamp/ITK,paulnovo/ITK,zachary-williamson/ITK,blowekamp/ITK,zachary-williamson/ITK,atsnyder/ITK,BRAINSia/ITK,spinicist/ITK,eile/ITK,heimdali/ITK,malaterre/ITK,CapeDrew/DCMTK-ITK,msmolens/ITK,cpatrick/ITK-RemoteIO