[MacPorts] #19834: boost: update to 1.39

[MacPorts]

#19834: boost: update to 1.39
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 Reporter:  arsptr@…                 |       Owner:  sanchom@…        
     Type:  update                   |      Status:  new              
 Priority:  Normal                   |   Milestone:                   
Component:  ports                    |     Version:  1.7.1            
 Keywords:                           |        Port:  boost            
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Comment(by guidolorenz@…):

 >  * Enable universal support (currently only ppc and i386).

 Please consider full universal support (i.e. including 64-bit) for the
 final port. I already filed a modification of the Boost 1.38 Portfile
 (#18963) that might help. I basically
 select the bjam {{{architecture}}} and {{{address-model}}} parameters
 according to {{{${universal_archs}}}}.

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Ticket URL: <http://trac.macports.org/ticket/19834#comment:6>
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