[MacPorts] #60533: ffmpeg patch to fix including opengl

[MacPorts]

#60533: ffmpeg patch to fix including opengl
---------------------------+--------------------
 Reporter:  gaming-hacker  |      Owner:  (none)
     Type:  defect         |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  ports          |    Version:  2.6.2
 Keywords:  opengl         |       Port:  ffmpeg
---------------------------+--------------------
 This patches fix the ability to add opengl to ffmpeg builds.

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Ticket URL: <https://trac.macports.org/ticket/60533>
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