[MacPorts] #23153: Update gzip to 1.3.13

[MacPorts]

#23153: Update gzip to 1.3.13
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 Reporter:  nox@…             |       Owner:  mww@…           
     Type:  update            |      Status:  new             
 Priority:  Normal            |   Milestone:                  
Component:  ports             |     Version:                  
 Keywords:                    |        Port:  gzip            
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 This patch updates gzip to 1.3.13, install its documentation and uses
 parallel building.

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Ticket URL: <http://trac.macports.org/ticket/23153>
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