message: Add NXT_GENERATED_FLAGS using set_property
diff: @@ -62,7 +62,7 @@ function(Generate)
  )
  NXTInternalTarget("${G_FOLDER}" ${G_LIB_NAME})
  - target_compile_options(${G_LIB_NAME} PRIVATE ${NXT_GENERATED_FLAGS})
  + set_property(TARGET ${G_LIB_NAME} APPEND PROPERTY COMPILE_OPTIONS ${NXT_GENERATED_FLAGS})
  endfunction()
  set(GENERATED_DIR ${CMAKE_CURRENT_BINARY_DIR} PARENT_SCOPE)
  