utils/serializer: add OrderedDict to POD_TYPES
utils/serializer: add OrderedDict to POD_TYPES

Allow OrderedDict to be serialized in the same way as regular dicts by
defining it as a Plain Old Data type.

ARM-software/workload-automation,setrofim/workload-automation,setrofim/workload-automation,setrofim/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,lisatn/workload-automation,lisatn/workload-automation,lisatn/workload-automation,ARM-software/workload-automation,setrofim/workload-automation