layers: Add scissor/viewport count checks
layers: Add scissor/viewport count checks

Change-Id: I35977325f662d3e4df84d02d2eefa4383fae9c05

KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers,KhronosGroup/Vulkan-LoaderAndValidationLayers