message: Use cmake GNUInstallDirs
  this make allow install the libraries (and headers) in different location than `lib` (Gentoo uses lib64 for 64-bits libs)
  also change the .cmake files for avoid conclicts if build both 32-bis and 64-bits (avoids conflict/overwrite files)
diff: @@ -640,12 +640,14 @@ if(MSVC)
  add_msvc_runtime_flag(onnxifi_dummy)
  endif()
  +include(GNUInstallDirs)
  +
  install(DIRECTORY ${ONNX_ROOT}/onnx
  - DESTINATION include
  + DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
  FILES_MATCHING
  PATTERN "*.h")
  install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/onnx
  - DESTINATION include
  + DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
  FILES_MATCHING
  PATTERN "*.h")
  @@ -660,13 +662,13 @@ configure_file(
  install(FILES
  ${PROJECT_BINARY_DIR}/ONNXConfigVersion.cmake
  ${PROJECT_BINARY_DIR}/ONNXConfig.cmake
  - DESTINATION share/cmake/ONNX
  + DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/ONNX
  COMPONENT dev)
  -install(EXPORT ONNXTargets DESTINATION share/cmake/ONNX)
  +install(EXPORT ONNXTargets DESTINATION "${CMAKE_INSTALL_LIBDIR}/cmake/ONNX")
  install(TARGETS
  onnx onnx_proto
  onnxifi onnxifi_dummy onnxifi_loader
  - EXPORT ONNXTargets DESTINATION lib)
  + EXPORT ONNXTargets DESTINATION ${CMAKE_INSTALL_LIBDIR})
  if(NOT ANDROID AND NOT IOS)
  install(TARGETS onnxifi_wrapper
  