Test updating set with an empty binding

Test updating set with an empty binding

This test matches VkPositiveLayerTest.EmptyDescriptorUpdateTest and
updates the last descriptor in a set that includes an empty binding.
The test doesn't check any results and it passes as long as no crash
happens.

New tests:
dEQP-VK.binding_model.descriptor_update.empty_descriptor.uniform_buffer

Components: Vulkan

VK-GL-CTS issue: 831

Change-Id: I795e08fa516d42d980d7b3b8baba6a1ba4a29ec7