[MacPorts] #44508: ruby21: fix compilation with libffi (*3.1!) so that module fiddle works

[MacPorts]

#44508: ruby21: fix compilation with libffi (*3.1!) so that module fiddle works
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  Reporter:  jfs.world@…  |      Owner:  kimuraw@…
      Type:  defect       |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:  2.3.1
Resolution:               |   Keywords:
      Port:  ruby21       |
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Changes (by ryandesign@…):

 * owner:  macports-tickets@… => kimuraw@…
 * port:   => ruby21


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Ticket URL: <https://trac.macports.org/ticket/44508#comment:2>
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