patch applied (packages/directory): canonicalizePath should also do System.FilePath.normalise

[Simon Marlow]

Tue Jan 22 08:59:14 PST 2008  Simon Marlow <simonmar at microsoft.com>
  * canonicalizePath should also do System.FilePath.normalise
  The example I've found where this is necessary is on Windows:
  canonicalizePath on its own doesn't upper-case the drive letter, but
  normalise does.

    M ./System/Directory.hs -1 +3