patch applied (packages/base): Add support for the IO manager thread on Windows

[Simon Marlow]

Fri Dec  1 07:20:42 PST 2006  Simon Marlow <simonmar at microsoft.com>
  * Add support for the IO manager thread on Windows
  Fixes #637.  The test program in that report now works for me with
  -threaded, but it doesn't work without -threaded (I don't know if
  that's new behaviour or not, though).

    M ./GHC/Conc.lhs -68 +188
    A ./cbits/Win32Utils.c
    M ./cbits/runProcess.c -100
    M ./include/HsBase.h +6