[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:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.4
Resolution:               |   Keywords:
      Port:  netgen       |
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Comment (by ian.rees@…):

 Updated the portfile to use ${prefix}/include/netgen for the headers
 instead of ${prefix}/share/netgen/libsrc following discussion with another
 FreeCAD developer.  Sorry about the quick change!  -Ian-

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Ticket URL: <https://trac.macports.org/ticket/50687#comment:1>
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