cmake _HAVE_STRDUP examples

HDFGroup/hdf5 config/ConfigureChecks.cmake :434 

CHECK_FUNCTION_EXISTS (strdup            ${HDF_PREFIX}_HAVE_STRDUP)

InsightSoftwareConsortium/ITK Modules/ThirdParty/HDF5/src/itkhdf5/config/cmake/ConfigureChecks.cmake :420 

CHECK_FUNCTION_EXISTS (strdup            ${HDF_PREFIX}_HAVE_STRDUP)

Tencent/Forward source/third_party/hdf5/config/cmake_ext_mod/ConfigureChecks.cmake :522 

CHECK_FUNCTION_EXISTS (strdup            ${HDF_PREFIX}_HAVE_STRDUP)

Kitware/VTK ThirdParty/hdf5/vtkhdf5/config/cmake_ext_mod/ConfigureChecks.cmake :457 

CHECK_FUNCTION_EXISTS (strdup            ${HDF_PREFIX}_HAVE_STRDUP)