[MacPorts] #62403: libvpx build does not obey deployment target setting

[MacPorts]

#62403: libvpx build does not obey deployment target setting
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  Reporter:  kencu   |      Owner:  dbevans
      Type:  defect  |     Status:  assigned
  Priority:  Normal  |  Milestone:
 Component:  ports   |    Version:
Resolution:          |   Keywords:
      Port:  libvpx  |
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Comment (by jmroot):

 Looks like you could patch `build/make/configure.sh` to not add its own
 `-mmacosx-version-min` and `-isysroot` flags.

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Ticket URL: <https://trac.macports.org/ticket/62403#comment:3>
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