[MacPorts] #59358: Add python2_qstring.diff debian patch to py-qtpy5 in order to fix pymol crashes under python27 and py27-pyqt5

[MacPorts]

#59358: Add python2_qstring.diff debian patch to py-qtpy5 in order to fix pymol
crashes under python27 and py27-pyqt5
------------------------+--------------------
  Reporter:  jwhowarth  |      Owner:  (none)
      Type:  update     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:
Resolution:             |   Keywords:
      Port:  py-qt5     |
------------------------+--------------------
Changes (by jwhowarth):

 * Attachment "Portfile.diff" added.

 Portfile diff to add python2_qstring.diff to py-pyqt5

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Ticket URL: <https://trac.macports.org/ticket/59358>
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