scripts:Mark 639 unimplemented in the database
scripts:Mark 639 unimplemented in the database

I believe VALIDATION_ERROR_00639 was marked as implemented because the
case is handled in parameter_checker, but the code itself has not been
updated so I'm switching it back to 'N' in the database for now until
the error code is actually updated.

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