header: Move vulkan.h to version 1.0.28
header: Move vulkan.h to version 1.0.28

Change-Id: I346877d18a2600e114ebee844fb5b5055c0ea5c5

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