vk::su::createInstance() in Utils.cpp needs parameter for flags to support VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME

[genkiyooka]

I understand this applies on any platform wrapping a native API with Vulkan, in my case MoltenVK.

It is possible to pass VK_KHR_PORTABILITY_ENUMERATION_EXTENSION_NAME to vk::su::createInstance() however the flags value of vk::InstanceCreateFlagBits::eEnumeratePortabilityKHR must also be set in vk::InstanceCreateInfo struct which is created in makeInstanceCreateInfoChain (Utils.cpp).