[MacPorts] #65969: Add port for gccgo - a Golang compiler based on gcc

[MacPorts]

#65969: Add port for gccgo - a Golang compiler based on gcc
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  Reporter:  iMacker2020  |      Owner:  (none)
      Type:  request      |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  gcc go golang
      Port:               |
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Comment (by barracuda156):

 This should be a variant for gcc* ports though, not a separate port, IMO.

 Like we also need for modula-2 and gccrs.

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Ticket URL: <https://trac.macports.org/ticket/65969#comment:3>
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