[MacPorts] #55068: gcc5 @5.4.0_2 update to 5.5.0

[MacPorts]

#55068: gcc5 @5.4.0_2 update to 5.5.0
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  Reporter:  nortcele  |      Owner:
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:
Resolution:            |   Keywords:
      Port:  gcc5      |
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Changes (by nortcele):

 * Attachment "gcc5.5.0.diff" added.

 patch to update portfile

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Ticket URL: <https://trac.macports.org/ticket/55068>
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