[MacPorts] #49109: port modifications required by making qt4-mac co-installable with Qt5

[MacPorts]

#49109: port modifications required by making qt4-mac co-installable with Qt5
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  Reporter:  RJVB         |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  ports        |    Version:
Resolution:               |   Keywords:  haspatch
      Port:               |
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Changes (by RJVB):

 * Attachment "py-pyqt4.diff" added.

 not so much an update to concurrent qt4-mac but a fix for the depends_lib
 reset caused by the Python PortGroup

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Ticket URL: <https://trac.macports.org/ticket/49109>
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