[MacPorts] #20782: update grep to 2.5.4

[MacPorts]

#20782: update grep to 2.5.4
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 Reporter:  jmr@…             |       Owner:  waqar@…           
     Type:  update            |      Status:  new               
 Priority:  Normal            |   Milestone:                    
Component:  ports             |     Version:                    
 Keywords:  haspatch          |        Port:  grep              
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 See attachment.

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Ticket URL: <http://trac.macports.org/ticket/20782>
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