ENH: Configure ITK-GDCM module internally to hide its options
ENH: Configure ITK-GDCM module internally to hide its options

The gdcm third-party code provides many cache options to configure its
build.  Set these as INTERNAL cache options to hide them from the ITK
configuration interface.

Change-Id: Id892798dd91dffaa24ea60218bdaedd718707ec7

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