[MacPorts] #18900: Remove hardcoded arch in openssl portfile

[MacPorts]

#18900: Remove hardcoded arch in openssl portfile
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 Reporter:  sam@…            |       Owner:  macports-tickets@…                   
     Type:  defect           |      Status:  new                                  
 Priority:  Normal           |   Milestone:  Port Bugs                            
Component:  ports            |     Version:  1.8.0                                
 Keywords:                   |        Port:  openssl                              
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 This change allowed me to build for x86_64 arch using +universal variant

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Ticket URL: <http://trac.macports.org/ticket/18900>
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