message: bindings: python: fix installation path
  Now the bindings should be installed according to the CMAKE_INSTALL_PREFIX, which might be modified by the user.
diff: @@ -15,4 +15,4 @@ configure_file(
  ${CMAKE_CURRENT_BINARY_DIR}/setup.py
  )
  -install(CODE "execute_process(WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} COMMAND ${PYTHON_EXECUTABLE} setup.py install)")
  +install(CODE "execute_process(WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR} COMMAND ${PYTHON_EXECUTABLE} setup.py install --prefix=${CMAKE_INSTALL_PREFIX})")
  