layers: Clarify invalid memory message
layers: Clarify invalid memory message

Fixes #906

When reporting an invalid memory region, include the object type and
handle that is bound to that region.

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