[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:
 Keywords:             |       Port:  py-qt5
-----------------------+--------------------
 The attached Portfile.diff and python2_qstring.diff eliminates the crashes
 seen when pymol is run against py27-qt5 and python27.

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