[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
 Keywords:           |       Port:  supertuxkart
---------------------+--------------------------
 Details:

 {{{
 supertuxkart/work/SuperTuxKart-1.4-src/lib/graphics_engine/include/vk_mvk_moltenvk.h:29:10:
 fatal error: 'IOSurface/IOSurfaceRef.h' file not found

 #include <IOSurface/IOSurfaceRef.h>
          ^~~~~~~~~~~~~~~~~~~~~~~~~~
 }}}

 https://ports.macports.org/port/supertuxkart/details/

 Do `IOSurface` headers have to be included differently for older macOS
 releases, or...?

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