[MacPorts] #50279: gtk-doc: Add python34 and python35 variants

[MacPorts]

#50279: gtk-doc: Add python34 and python35 variants
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 Reporter:  mf2k@…       |      Owner:  devans@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  ports        |    Version:
 Keywords:               |       Port:  gtk-doc
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 Can python34 and python35 variants be added so python27 is not required?

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Ticket URL: <https://trac.macports.org/ticket/50279>
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