patch applied (ghc): Don't dump simplifier iterations with -dverbose-core2core

[Roman Leshchinskiy]

Wed Dec 12 19:46:35 PST 2007  Roman Leshchinskiy <rl at cse.unsw.edu.au>
  * Don't dump simplifier iterations with -dverbose-core2core
  
  SimonPJ says this is the correct behaviour. We still have
  -ddump-simpl-iterations.

    M ./compiler/coreSyn/CoreLint.lhs -3 +10
    M ./compiler/simplCore/SimplCore.lhs -2 +2