winsdk: Allow Configuring layers for older SDKs
winsdk: Allow Configuring layers for older SDKs

Change-Id: I9b13d7c43ee159f935d289ea939ac3c2c1e54875

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