layers: Bind mem 2 entry points
layers: Bind mem 2 entry points

Add entry points for VK_KHR_bind_memory2 and wire up to existing
validation

Change-Id: Iab17ead7a6f6f44fdbdf2ad5033d2ea7e47447d0

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