[MacPorts] #30802: pianobar: simplify setting -arch flags

[MacPorts]

#30802: pianobar: simplify setting -arch flags
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 Reporter:  ryandesign@…             |       Owner:  aguynamedryan+pianobar@…        
     Type:  enhancement              |      Status:  new                             
 Priority:  Normal                   |   Milestone:                                  
Component:  ports                    |     Version:  2.0.1                           
 Keywords:  haspatch                 |        Port:  pianobar                        
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Comment(by aguynamedryan+macports@…):

 Builds fine for me under Snow Leopard.  Couldn't test it very thoroughly
 since Pandora's API changed and pianobar has yet to release an fix.

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Ticket URL: <https://trac.macports.org/ticket/30802#comment:1>
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