loader: Add WSI "device" trampoline funcs (e.g. vkCreateSwapchainKHR).
loader: Add WSI "device" trampoline funcs (e.g. vkCreateSwapchainKHR).

This is because these entrypoints are now "statically defined" (i.e. the loader
on Windows, Linux, and Android will export these symbols directly, with no need
to call a GPA() function).

KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools,KhronosGroup/Vulkan-Tools