STYLE: The FFTW libs should be co-located with ITK
STYLE: The FFTW libs should be co-located with ITK

When building FFTW internal to ITK, the fftw headers/libs
should be co-located with the ITK headers.  This patch
makes installation of FFTW and ITK consistent.

Change-Id: If2d4a429057c195bfb06056e8c68b8f827dbfe7a

InsightSoftwareConsortium/ITK,spinicist/ITK,biotrump/ITK,GEHC-Surgery/ITK,fbudin69500/ITK,spinicist/ITK,fedral/ITK,biotrump/ITK,vfonov/ITK,jmerkow/ITK,PlutoniumHeart/ITK,vfonov/ITK,spinicist/ITK,fedral/ITK,fedral/ITK,thewtex/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,zachary-williamson/ITK,GEHC-Surgery/ITK,hjmjohnson/ITK,vfonov/ITK,LucHermitte/ITK,msmolens/ITK,richardbeare/ITK,hinerm/ITK,hjmjohnson/ITK,biotrump/ITK,BlueBrain/ITK,ajjl/ITK,msmolens/ITK,LucasGandel/ITK,stnava/ITK,Kitware/ITK,fbudin69500/ITK,hinerm/ITK,biotrump/ITK,malaterre/ITK,heimdali/ITK,LucasGandel/ITK,fuentesdt/InsightToolkit-dev,stnava/ITK,stnava/ITK,eile/ITK,vfonov/ITK,fbudin69500/ITK,BlueBrain/ITK,BRAINSia/ITK,atsnyder/ITK,vfonov/ITK,spinicist/ITK,hendradarwin/ITK,vfonov/ITK,heimdali/ITK,LucHermitte/ITK,hinerm/ITK,LucHermitte/ITK,atsnyder/ITK,ajjl/ITK,fuentesdt/InsightToolkit-dev,BlueBrain/ITK,blowekamp/ITK,BRAINSia/ITK,biotrump/ITK,blowekamp/ITK,thewtex/ITK,jmerkow/ITK,blowekamp/ITK,atsnyder/ITK,jmerkow/ITK,thewtex/ITK,heimdali/ITK,thewtex/ITK,jcfr/ITK,BlueBrain/ITK,eile/ITK,fuentesdt/InsightToolkit-dev,hendradarwin/ITK,thewtex/ITK,stnava/ITK,Kitware/ITK,hjmjohnson/ITK,eile/ITK,BRAINSia/ITK,BlueBrain/ITK,LucHermitte/ITK,ajjl/ITK,PlutoniumHeart/ITK,jmerkow/ITK,blowekamp/ITK,richardbeare/ITK,hinerm/ITK,LucHermitte/ITK,PlutoniumHeart/ITK,heimdali/ITK,hendradarwin/ITK,hjmjohnson/ITK,msmolens/ITK,biotrump/ITK,hendradarwin/ITK,hinerm/ITK,BRAINSia/ITK,fbudin69500/ITK,jcfr/ITK,hendradarwin/ITK,eile/ITK,PlutoniumHeart/ITK,richardbeare/ITK,heimdali/ITK,malaterre/ITK,fedral/ITK,spinicist/ITK,zachary-williamson/ITK,fuentesdt/InsightToolkit-dev,malaterre/ITK,Kitware/ITK,Kitware/ITK,stnava/ITK,atsnyder/ITK,atsnyder/ITK,BlueBrain/ITK,fuentesdt/InsightToolkit-dev,PlutoniumHeart/ITK,stnava/ITK,stnava/ITK,jmerkow/ITK,stnava/ITK,heimdali/ITK,LucasGandel/ITK,GEHC-Surgery/ITK,fbudin69500/ITK,atsnyder/ITK,hinerm/ITK,ajjl/ITK,fbudin69500/ITK,biotrump/ITK,jcfr/ITK,spinicist/ITK,LucHermitte/ITK,PlutoniumHeart/ITK,zachary-williamson/ITK,stnava/ITK,GEHC-Surgery/ITK,eile/ITK,LucHermitte/ITK,ajjl/ITK,jmerkow/ITK,blowekamp/ITK,malaterre/ITK,BRAINSia/ITK,jcfr/ITK,BRAINSia/ITK,atsnyder/ITK,ajjl/ITK,vfonov/ITK,Kitware/ITK,spinicist/ITK,fuentesdt/InsightToolkit-dev,GEHC-Surgery/ITK,msmolens/ITK,zachary-williamson/ITK,ajjl/ITK,fuentesdt/InsightToolkit-dev,LucasGandel/ITK,hinerm/ITK,jcfr/ITK,Kitware/ITK,blowekamp/ITK,jmerkow/ITK,heimdali/ITK,InsightSoftwareConsortium/ITK,fedral/ITK,fuentesdt/InsightToolkit-dev,LucasGandel/ITK,richardbeare/ITK,LucasGandel/ITK,zachary-williamson/ITK,malaterre/ITK,GEHC-Surgery/ITK,richardbeare/ITK,BlueBrain/ITK,malaterre/ITK,jmerkow/ITK,malaterre/ITK,LucasGandel/ITK,jcfr/ITK,PlutoniumHeart/ITK,hjmjohnson/ITK,vfonov/ITK,fuentesdt/InsightToolkit-dev,eile/ITK,jcfr/ITK,InsightSoftwareConsortium/ITK,zachary-williamson/ITK,msmolens/ITK,atsnyder/ITK,msmolens/ITK,fedral/ITK,vfonov/ITK,fbudin69500/ITK,zachary-williamson/ITK,InsightSoftwareConsortium/ITK,hendradarwin/ITK,malaterre/ITK,eile/ITK,fedral/ITK,zachary-williamson/ITK,hendradarwin/ITK,richardbeare/ITK,blowekamp/ITK,hendradarwin/ITK,InsightSoftwareConsortium/ITK,BRAINSia/ITK,PlutoniumHeart/ITK,LucHermitte/ITK,msmolens/ITK,hinerm/ITK,heimdali/ITK,fedral/ITK,InsightSoftwareConsortium/ITK,hinerm/ITK,GEHC-Surgery/ITK,ajjl/ITK,zachary-williamson/ITK,atsnyder/ITK,richardbeare/ITK,jcfr/ITK,fbudin69500/ITK,eile/ITK,BlueBrain/ITK,hjmjohnson/ITK,blowekamp/ITK,thewtex/ITK,biotrump/ITK,GEHC-Surgery/ITK,spinicist/ITK,spinicist/ITK,malaterre/ITK,Kitware/ITK,LucasGandel/ITK,thewtex/ITK,eile/ITK,msmolens/ITK