[MacPorts] #55814: py-isodate: restore py34 subport

[MacPorts]

#55814: py-isodate: restore py34 subport
---------------------+------------------------
 Reporter:  dbevans  |      Owner:  esafak
     Type:  defect   |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  py-isodate
---------------------+------------------------
 Reequired to build
 *  py34-prov
 *  py34-rdflib
 *  py34-sparqlwrapper

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Ticket URL: <https://trac.macports.org/ticket/55814>
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