patch applied (ghc): Fix big character literal printing in External Core

[Tim Chevalier]

Sat Mar 29 15:11:09 PDT 2008  Tim Chevalier <chevalier at alum.wellesley.edu>
  * Fix big character literal printing in External Core
  
  Characters bigger than '\xff' should be represented as int
  literals in External Core. (This was originally fixed five years ago
  and broken again four and a half years ago...)

    M ./compiler/coreSyn/MkExternalCore.lhs -1 +8