[GHC] #7941: Running 'make maintainer-clean' doesn't remove all build artefacts

[GHC]

#7941: Running 'make maintainer-clean' doesn't remove all build artefacts
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Reporter:  jstolarek         |          Owner:  jstolarek       
    Type:  task              |         Status:  new             
Priority:  normal            |      Component:  Build System    
 Version:  7.7               |       Keywords:                  
      Os:  Unknown/Multiple  |   Architecture:  Unknown/Multiple
 Failure:  None/Unknown      |      Blockedby:                  
Blocking:                    |        Related:                  
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 Running `make maintainer-clean` in the build tree doesn't remove all build
 artefacts. I'd like to update Makefiles so that these files are removed.

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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7941>
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