message: Added a feature so that I can extend the RPATH settings at the command line
diff: @@ -109,6 +109,8 @@ endif()
  set(CMAKE_MACOSX_RPATH 1)
  if(APPLE)
  set(CMAKE_INSTALL_RPATH "@loader_path/;@loader_path/../tensorflow;")
  +elseif(DEFINED NGRAPH_TF_RPATH)
  + set(CMAKE_INSTALL_RPATH "\$ORIGIN:\$ORIGIN/../tensorflow:${NGRAPH_TF_RPATH}")
  else()
  set(CMAKE_INSTALL_RPATH "\$ORIGIN:\$ORIGIN/../tensorflow")
  endif()
  