[MacPorts] #58275: octave does not build graphics toolkit qt with qt4

[MacPorts]

#58275: octave does not build graphics toolkit qt with qt4
----------------------------+--------------------
 Reporter:  chrisjohgorman  |      Owner:  (none)
     Type:  defect          |     Status:  new
 Priority:  Normal          |  Milestone:
Component:  ports           |    Version:  2.5.4
 Keywords:  octave qt4-mac  |       Port:  octave
----------------------------+--------------------
 see [https://savannah.gnu.org/bugs/?func=detailitem&item_id=55735] for
 more details.

 As I understand it `QGLWidget` is not detected with `qt4` and as a result
 qt is not built as a `graphics_toolkit`.  This leaves `gnuplot` as the
 only plotting engine that works.  This is problematic for me as it leaks
 and doesn't allow for closing of figures very well.

 The fix was two patches outlined in the savannah bug report.  I've
 attached both patches to this ticket.  The first `4af9840f9ce5` applies
 properly to `octave 5.1`.  The second `e247ecdee41d` I needed to patch by
 hand both hunks fail due to missing markers in the 5.1 code.  The code
 builds and runs on my machine which is a snow leopard machine (10.6.8).

 Let me know if you have a git tree you would like me to patch and push
 changes to you.

-- 
Ticket URL: <https://trac.macports.org/ticket/58275>
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