turnip: robustness
We've got failures in tests like dEQP-VK.robustness.buffer_access.fragment.texel_copy.out_of_alloc.oob_storage_read
even though we're not setting the robustBufferAccess flag:
Test case 'dEQP-VK.robustness.buffer_access.fragment.texel_copy.out_of_alloc.oob_storage_read'..
Fail (vk.createDevice(physicalDevice, pCreateInfo, pAllocator, &object): VK_ERROR_FEATURE_NOT_PRESENT at vkRefUtilImpl.inl:175)
We want to support robust buffer access anyway.