[MacPorts] #47025: poppler: add Qt5 subport and optional test support.

[MacPorts]

#47025: poppler: add Qt5 subport and optional test support.
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  Reporter:  rjvbertin@…  |      Owner:  devans@…
      Type:  enhancement  |     Status:  assigned
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:  poppler      |
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Comment (by devans@…):

 Attached is my current proposed upgrade to the current poppler 0.33 port.
 This assumes that qt4-mac and qt5-mac can now be installed in parallel
 (#48206).

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Ticket URL: <https://trac.macports.org/ticket/47025#comment:25>
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