[GHC] #8681: Don't disable dynamic linking for LLVM flavours

[GHC]

#8681: Don't disable dynamic linking for LLVM flavours
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       Reporter:  bgamari           |             Owner:
           Type:  bug               |            Status:  new
       Priority:  normal            |         Milestone:  7.8.1
      Component:  Compiler          |           Version:  7.6.3
       Keywords:                    |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
     Difficulty:  Unknown           |         Test Case:
     Blocked By:                    |          Blocking:
Related Tickets:                    |
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 build.mk.sample still disables dynamic linking, despite this configuration
 now being supported. Fix this. Patch attached.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8681>
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