[MacPorts] #48427: maxima: add gcl variant

[MacPorts]

#48427: maxima: add gcl variant
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  Reporter:  ephemeris@…  |      Owner:  KubaO
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:
      Port:  maxima       |
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Comment (by KubaO):

 The gcl variant doesn't currently build, it's an issue on maxima's end it
 seems. The clisp variant I have to check on.

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Ticket URL: <https://trac.macports.org/ticket/48427#comment:2>
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