[MacPorts] #53480: BladeRF Building fails on OSX 10.11.6

[MacPorts]

#53480: BladeRF Building fails on OSX 10.11.6
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  Reporter:  rensd    |      Owner:  michaelld
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.4.0
Resolution:           |   Keywords:
      Port:  bladeRF  |
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Comment (by michaelld):

 Looks like
 https://github.com/Nuand/bladeRF/commit/b6f6267253d17081d03e553b1451218fa5991570
 broke the build.

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Ticket URL: <https://trac.macports.org/ticket/53480#comment:2>
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