[MacPorts] #54236: port:mesa & port:libepoxy : provide and support EGL

[MacPorts]

#54236: port:mesa & port:libepoxy : provide and support EGL
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  Reporter:  RJVB           |      Owner:
      Type:  enhancement    |     Status:  new
  Priority:  Normal         |  Milestone:
 Component:  ports          |    Version:
Resolution:                 |   Keywords:  haspatch
      Port:  mesa libepoxy  |
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Changes (by RJVB):

 * Attachment "mesa-egl.diff" added.

 update for mesa 17.1.6

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Ticket URL: <https://trac.macports.org/ticket/54236>
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