[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@…):

 Replying to [comment:38 cal@…]:
 > My version of the Portfile seems to miscompile ghc. I don't yet know
 why, I'll try to have a look tomorrow.
 I've setup the Portfile with a test phase, to help debug the mis-
 compilations.
 For me on gcc47 I get 6 unexpected failures 4 look harmless, 2 look iffy
 but are in
 the objective-c bridge, which doesn't seem very popular. I'll try and ask
 about
 7.4.2 and the objective-c bridge on the IRC channel. It's possible
 that these features have only really be tested with apple-gcc42.
 Perhaps, I should add a variant for that.

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Ticket URL: <https://trac.macports.org/ticket/25558#comment:41>
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