[MacPorts] #54818: clang-5.0 depends on gcc6 instead of gcc7

[MacPorts]

#54818: clang-5.0 depends on gcc6 instead of gcc7
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  Reporter:  mouse07410  |      Owner:
      Type:  update      |     Status:  closed
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:
Resolution:  duplicate   |   Keywords:
      Port:  clang-5.0   |
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Comment (by jeremyhu):

 Or rather #54766

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Ticket URL: <https://trac.macports.org/ticket/54818#comment:2>
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