message: Added `-j` option to the ngraph make command.
diff: @@ -51,7 +51,7 @@ ExternalProject_Add(
  DOWNLOAD_DIR "${CMAKE_CURRENT_BINARY_DIR}/ngraph/download"
  SOURCE_DIR "${CMAKE_CURRENT_BINARY_DIR}/ngraph/src"
  BINARY_DIR "${CMAKE_CURRENT_BINARY_DIR}/ngraph/build"
  - BUILD_COMMAND make ngraph
  + BUILD_COMMAND make -j $(nproc) ngraph
  UPDATE_COMMAND ""
  )
  