[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 mojca@…):

 David, may I please ask you to commit this now that the Qt4/5 packaging
 issues have been resolved?

 I wanted to build TeXworks (#16055, https://github.com/TeXworks/texworks)
 in order to be able to check some translation strings, but their CMake-
 based build system is failing to find `poppler-qt4-mac` for some reason
 and I'm not eager to debug yet another software right now.

 Your patch `poppler-0.33-qt5-mac.diff​` works for me and `poppler-qt5-mac`
 installs without any issues.

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Ticket URL: <https://trac.macports.org/ticket/47025#comment:27>
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