[MacPorts] #67263: supertuxkart @1.4: builds fail for 10.12 and earlier: IOSurface/IOSurfaceRef.h not found

[MacPorts]

#67263: supertuxkart @1.4: builds fail for 10.12 and earlier:
IOSurface/IOSurfaceRef.h not found
---------------------------+--------------------
  Reporter:  mascguy       |      Owner:  (none)
      Type:  defect        |     Status:  new
  Priority:  Normal        |  Milestone:
 Component:  ports         |    Version:  2.8.1
Resolution:                |   Keywords:
      Port:  supertuxkart  |
---------------------------+--------------------

Comment (by mascguy):

 Worst-case, if upstream now depends on newer frameworks, we may simply
 need to fallback to an older version where necessary.

 @kencu and @evanmiller, you folks have both updated and/or patched this
 port of late. Thoughts/comments...?

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Ticket URL: <https://trac.macports.org/ticket/67263#comment:3>
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