[GHC] #8444: Fix CPP issue with Xcode5 in integer-simple

[GHC]

#8444: Fix CPP issue with Xcode5 in integer-simple
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       Reporter:  lukexi             |             Owner:
           Type:  bug                |            Status:  new
       Priority:  highest            |         Milestone:  7.8.1
      Component:  libraries (other)  |           Version:  7.7
       Keywords:                     |  Operating System:  Unknown/Multiple
   Architecture:  Unknown/Multiple   |   Type of failure:  Building GHC
     Difficulty:  Easy (less than 1  |  failed
  hour)                              |         Test Case:
     Blocked By:                     |          Blocking:
Related Tickets:                     |
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 This works around a build failure with Xcode 5's version of clang, wherein
 writing WORD_SIZE_IN_BITS.0 results in "64 .0" (note the space).

 (this is for libraries/integer-simple)

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8444>
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