message: python: eliminate DeprecationWarning: SO -> EXT_SUFFIX
  The `sysconfig` key `SO` is deprecated, it has been replaced by `EXT_SUFFIX`
diff: @@ -43,7 +43,11 @@ ocv_target_link_libraries(${the_module} LINK_PRIVATE ${deps})
  if(DEFINED ${PYTHON}_CVPY_SUFFIX)
  set(CVPY_SUFFIX "${${PYTHON}_CVPY_SUFFIX}")
  else()
  - execute_process(COMMAND ${${PYTHON}_EXECUTABLE} -c "import distutils.sysconfig; print(distutils.sysconfig.get_config_var('SO'))"
  + set(__python_ext_suffix_var "EXT_SUFFIX")
  + if("${${PYTHON}_VERSION_MAJOR}" STREQUAL "2")
  + set(__python_ext_suffix_var "SO")
  + endif()
  + execute_process(COMMAND ${${PYTHON}_EXECUTABLE} -c "import distutils.sysconfig; print(distutils.sysconfig.get_config_var('${__python_ext_suffix_var}'))"
  RESULT_VARIABLE PYTHON_CVPY_PROCESS
  OUTPUT_VARIABLE CVPY_SUFFIX
  OUTPUT_STRIP_TRAILING_WHITESPACE)
  