[MacPorts] #31977: mercurial: simplify getting archflags

[MacPorts]

#31977: mercurial: simplify getting archflags
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 Reporter:  ryandesign@…             |       Owner:  deric@…           
     Type:  enhancement              |      Status:  new               
 Priority:  Normal                   |   Milestone:                    
Component:  ports                    |     Version:  2.0.3             
 Keywords:  haspatch                 |        Port:  mercurial         
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 This patch simplifies how mercurial gets the canonical archflags.

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Ticket URL: <https://trac.macports.org/ticket/31977>
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