Vulkan Object for PHP

[spencer-lunarg]

Some repo parse the vk.xml in PHP and the current vulkan_object.py won't work for them

Need to create a way to get the base generator into a format that PHP could consume

[SaschaWillems]

Just to chime in on this: I know at least a dozen other projects that parse vk.xml for various use cases. A Pyhton (or whatever language) script won't help. vk.xml IS the best way for use cases like mine. So I'd rather prefer if we could improve vk.xml. See internal Vulkan issue 4208.