[MacPorts] #25558: ghc: update to latest version

[MacPorts]

#25558: ghc: update to latest version
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 Reporter:  jwiegley@…          |       Owner:  gwright@…           
     Type:  update              |      Status:  assigned            
 Priority:  Normal              |   Milestone:                      
Component:  ports               |     Version:                      
 Keywords:                      |        Port:  ghc ghc-devel       
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Comment(by kitchen.andy@…):

 Ok so, Just spent two hours debugging a GHC build error,
 FYI everyone using clang as the preprocessor breaks stuff.
 Notably building ghc itself.

 I'm still going to leave the ghc-bootstrap version as 7.0.4
 because that's the current haskell platform version and it seems
 free of the freaky linking problems and ghc does a 2-stage
 bootstrap anyway.

 Regards

 AK

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Ticket URL: <https://trac.macports.org/ticket/25558#comment:27>
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