[MacPorts] #16437: cdf: enable nice build (don't override build phase)

[MacPorts]

#16437: cdf: enable nice build (don't override build phase)
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  Reporter:  ryandesign at macports.org  |       Owner:  gwright at macports.org
      Type:  defect                   |      Status:  new                 
  Priority:  Normal                   |   Milestone:  Port Bugs           
 Component:  ports                    |     Version:  1.6.0               
Resolution:                           |    Keywords:                      
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Comment(by ryandesign at macports.org):

 There's also no reason to override the destroot. Another patch for that is
 attached.

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Ticket URL: <http://trac.macports.org/ticket/16437#comment:1>
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