vulkan: Update vk_icd.h to interface version 3
Import from commit f2aeefec on branch 'master' of https://github.com/KhronosGroup/Vulkan-LoaderAndValidationLayers . Reviewed-by:Emil Velikov <emil.velikov@collabora.com> Cc: mesa-stable@lists.freedesktop.org (cherry picked from commit 98cf0898)