layers: gllavl#77 validate layout during clear
layers: gllavl#77 validate layout during clear

Change-Id: I427cd1fcc6ecf115dbaf521387a909f117c13d07

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