message: fix: make VULKAN_HPP_RUN_GENERATOR work again
  Apparently, the statement setting ${vulkan_hpp} was removed with along
  with the other generated header files the other generated header files.
diff: @@ -121,6 +121,9 @@ add_executable(VulkanHppGenerator
  ${TINYXML2_HEADERS}
  )
  +file(TO_NATIVE_PATH ${VulkanHeaders_INCLUDE_DIR}/vulkan/vulkan.hpp vulkan_hpp)
  +string(REPLACE "\\" "\\\\" vulkan_hpp ${vulkan_hpp})
  +
  target_compile_definitions(${PROJECT_NAME} PUBLIC -DBASE_PATH="${CMAKE_SOURCE_DIR}")
  set_property(TARGET ${PROJECT_NAME} PROPERTY CXX_STANDARD 17)
  