[MacPorts] #28375: jpeg: update to 8c

[MacPorts]

#28375: jpeg: update to 8c
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 Reporter:  jmr@…             |       Owner:  waqar@…           
     Type:  update            |      Status:  new               
 Priority:  Normal            |   Milestone:                    
Component:  ports             |     Version:                    
 Keywords:                    |        Port:  jpeg              
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 Patch also adds license, enables tests, and installs docs.

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Ticket URL: <https://trac.macports.org/ticket/28375>
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