[MacPorts] #56521: gcc8 @8-20170604_2: update to 8.1

[MacPorts]

#56521: gcc8 @8-20170604_2: update to 8.1
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  Reporter:  iqgrande  |      Owner:  (none)
      Type:  update    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.4
Resolution:            |   Keywords:
      Port:  gcc8      |
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Comment (by vit9696):

 Hi,

 Thank you very much for finding time work on it. It really needed some
 attention.

 However, I am not sure it is the right decision of making cctools hacks
 within gcc port itself. Even if that fixes gcc compatibility with cctools,
 I am not positive other ports do not share the same issue.
 Could you please consider making a cctools +xcode variant and making a
 dependency on it, as a cleaner solution?

 Vit

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Ticket URL: <https://trac.macports.org/ticket/56521#comment:19>
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