[MacPorts] #55033: gcc5: add workable gcj functionality back

[MacPorts]

#55033: gcc5: add workable gcj functionality back
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  Reporter:  kencu   |      Owner:
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  gcc5    |
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Comment (by nortcele):

 Caution, these patches are adapted for the first gcc5.5 release candidate,
 a transitionnal version. The final version should appear soon and then
 informations specific to the release candidate won't be valid.

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Ticket URL: <https://trac.macports.org/ticket/55033#comment:1>
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