patch applied (packages/base): For nhc98 only, use hsc2hs to determine System.Posix.Types.

[Malcolm Wallace]

Fri Apr 13 08:58:31 PDT 2007  Malcolm.Wallace at cs.york.ac.uk
  * For nhc98 only, use hsc2hs to determine System.Posix.Types.
  Avoids the existing autoconf stuff, by introducing an auxiliary module
  called NHC.PosixTypes that uses hsc2hs, which is then simply re-exported
  from System.Posix.Types.

    M ./Makefile.nhc98 -2 +2
    A ./NHC/PosixTypes.hsc
    M ./System/Posix/Types.hs -1 +26