cmake IREE_LINKER_HAVE_NO_WARN_DUPLICATE_LIBRARIES examples

iree-org/iree build_tools/cmake/iree_setup_toolchain.cmake :249 

check_linker_flag(CXX "${_FLAG_NO_WARN_DUP_LIB}"
      IREE_LINKER_HAVE_NO_WARN_DUPLICATE_LIBRARIES)