patch applied (ghc): Virtualize the cwd in GHCi

Sat Apr 5 12:22:37 EDT 2008

Sat Apr  5 07:51:36 PDT 2008  Pepe Iborra <mnislaih at gmail.com>
  * Virtualize the cwd in GHCi
  
  This fixes the issue where :list would stop working if the
  program being debugged side-effected the working directory,
  and should prevent other similar issues
  

    M ./compiler/ghci/GhciMonad.hs -1 +28
    M ./compiler/ghci/InteractiveUI.hs -11 +10