[MacPorts] #41007: textmate2: add missing Mavericks build dependency on gnutar

[MacPorts]

#41007: textmate2: add missing Mavericks build dependency on gnutar
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  Reporter:  aronnax@…  |      Owner:  cal@…
      Type:  defect     |     Status:  new
  Priority:  Normal     |  Milestone:
 Component:  ports      |    Version:  2.2.0
Resolution:             |   Keywords:
      Port:  textmate2  |
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Comment (by ryandesign@…):

 If it's not using any exotic `gnutar` flags, I'd rather patch it to use
 `tar` instead and skip the dependency.

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Ticket URL: <https://trac.macports.org/ticket/41007#comment:2>
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