patch applied (cabal): Add utils functions copyFiles, findFileWithExtension, findFileWithExtension'

[Duncan Coutts]

Tue Jan 29 15:55:59 PST 2008  Duncan Coutts <duncan at haskell.org>
  * Add utils functions copyFiles, findFileWithExtension, findFileWithExtension'
  and rewrite findFile in a similar style. These are to help simplify and
  replace the existing functions smartCopySources, moduleToFilePath and
  moduleToFilePath2.

    M ./Distribution/Simple/Utils.hs -7 +70