[MacPorts] #19283: Update mercurial port to use python26

[MacPorts]

#19283: Update mercurial port to use python26
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Reporter:  akitada@…             |       Owner:  deric@…           
    Type:  enhancement           |      Status:  new               
Priority:  Normal                |   Component:  ports             
 Version:  1.7.1                 |    Keywords:                    
    Port:  mercurial             |  
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Comment(by danger@…):

 attached patch seems to work fine.

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Ticket URL: <http://trac.macports.org/ticket/19283#comment:3>
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