patch applied (ghc-6.12/packages/Cabal): Change preprocessModule to preprocessFile

[Ian Lynagh]

Mon Dec 28 11:01:25 PST 2009  Duncan Coutts <duncan at haskell.org>
  * Change preprocessModule to preprocessFile
  So we can stop pretending that "main-is: foo.hs" is a module name.
  Also allows us to deprecate ModuleName.simple which bypasses the
  ModuleName type invariant.

    M ./Distribution/ModuleName.hs -1 +1
    M ./Distribution/Simple/PreProcess.hs -20 +16