[GHC] #13896: Use response file to invoke hsc2hs

[GHC]

#13896: Use response file to invoke hsc2hs
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           Reporter:  bgamari           |             Owner:  (none)
               Type:  bug               |            Status:  new
           Priority:  high              |         Milestone:  8.4.1
          Component:  hsc2hs            |           Version:  8.0.1
           Keywords:                    |  Operating System:  Windows
       Architecture:  Unknown/Multiple  |   Type of failure:  None/Unknown
          Test Case:                    |        Blocked By:
           Blocking:                    |   Related Tickets:
Differential Rev(s):                    |         Wiki Page:
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 We already use response files when invoking Haddock due to Windows command
 line length limitations. It
 [[https://github.com/haskell/cabal/issues/3122#issuecomment-311489312|seems]]
 that we also need to do the same with `hsc2hs`.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13896>
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