COMP: add cstring include for memcpy
COMP: add cstring include for memcpy

According to this ITK ticket:

https://itk.icts.uiowa.edu/jira/browse/ITK-2894

Adding #include <cstring> is necessary to compile ITK on Linux
with CLang 3.1.  Other compiler/OS combinations seem not to have
this problem.

Change-Id: I7462143d1470123007b9e891ab4fcd6120c075db

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