[MacPorts] #54151: qjackctl @0.45+qt4: variant +qt4 fails to build on Sierra

[MacPorts]

#54151: qjackctl @0.45+qt4: variant +qt4 fails to build on Sierra
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  Reporter:  detlevd   |      Owner:
      Type:  defect    |     Status:  new
  Priority:  Normal    |  Milestone:
 Component:  ports     |    Version:  2.4.1
Resolution:            |   Keywords:
      Port:  qjackctl  |
-----------------------+-------------------

Comment (by mf2k):

 Please update your patch to use {{{system -W $path}}} instead of {{{system
 "cd $path"}}}.

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Ticket URL: <https://trac.macports.org/ticket/54151#comment:10>
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