[MacPorts] #50687: netgen @5.3.1 Add nglib and occ variants

[MacPorts]

#50687: netgen @5.3.1 Add nglib and occ variants
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  Reporter:  ian.rees@…   |      Owner:  sean@…
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  netgen       |
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Comment (by sean@…):

 I've lost some context here but do we really need this as a variant? Why
 not just build it all the time?

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Ticket URL: <https://trac.macports.org/ticket/50687#comment:13>
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