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
1 file changed