[MacPorts] #16497: glpk: enable parallel build

[MacPorts]

#16497: glpk: enable parallel build
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 Reporter:  ryandesign at macports.org  |       Owner:  lutz.horn at fastmail.fm
     Type:  enhancement              |      Status:  new                  
 Priority:  Normal                   |   Milestone:  Port Updates         
Component:  ports                    |     Version:  1.6.0                
 Keywords:                           |        Port:                       
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 May I commit this change to enable the parallel build feature for the glpk
 port? It allows it to be built quicker on multiprocessor systems.

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Ticket URL: <http://trac.macports.org/ticket/16497>
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