cmake VTK_HAVE_GETSOCKNAME_WITH_SOCKLEN_T_COMPILED examples

Kitware/VTK Common/System/vtkTestSocketFeatures.cmake :18 

try_compile(VTK_HAVE_GETSOCKNAME_WITH_SOCKLEN_T_COMPILED
    ${CMAKE_CURRENT_BINARY_DIR}/CMakeTmp/SocklenT
    ${CMAKE_CURRENT_SOURCE_DIR}/vtkTestSocklenT.cxx
    CMAKE_FLAGS "-DLINK_LIBRARIES:STRING=${VTK_GETSOCKNAME_LIBS}"
    OUTPUT_VARIABLE OUTPUT)