Specify correct library flag when creating partial pipelines

util/test/demos/vk/vk_parameter_zoo.cpp

@@ -1484,6 +1484,8 @@ void main()
 
       vkh::GraphicsPipelineCreateInfo libCreateInfo;
 
+      libCreateInfo.flags = VK_PIPELINE_CREATE_LIBRARY_BIT_KHR;
+
       libCreateInfo.layout = layout;
 
       libCreateInfo.vertexInputState.vertexBindingDescriptions = {vkh::vertexBind(0, DefaultA2V)};