Get the ABI size of this type according to data layout *target_data*.

def get_abi_size(self, target_data, context=None):
        """
        Get the ABI size of this type according to data layout *target_data*.
        """
        llty = self._get_ll_pointer_type(target_data, context)
        return target_data.get_pointee_abi_size(llty)