Fix KWSYS_PLATFORM_INFO_TEST when user removes tree
Fix KWSYS_PLATFORM_INFO_TEST when user removes tree

In commit 'Create KWSYS_PLATFORM_INFO_TEST macro' (2009-11-20) we
implemented the macro to use a cache entry to avoid re-running the
try_compile().  However, the output copied from the try_compile is
needed on every configure.  If the user wipes out the build tree but not
the cache file then the try_compile() will not re-run to recreate the
needed file.  We address the problem by teaching the macro to run the
try_compile() whenever its output file does not exist.

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