BUG: Correctly add CUDA library paths for ITKCommon

Put CUDA library *directory* in ITKCommon_SYSTEM_LIBRARY_DIRS
Add library *names* to ITKCommon_LIBRARIES

Change-Id: Ie9e5fb16f31642df96d2365c5e5ddb26ceed8aaf
BUG: Fix support for external GDCM build

These fixes were taken from MITK/CMakeExternals/PatchITK-4.3.1.cmake

Change-Id: I6ca47ead05232ef5f21031ab244daf3dea78f269