patch applied (testsuite): fix up tests for Windows

[Simon Marlow]

Wed Aug 30 07:44:28 PDT 2006  Simon Marlow <simonmar at microsoft.com>
  * fix up tests for Windows
  threadDelay is not interruptible on Windows with the threaded RTS.
  Work around it in conc014, conc015 and conc017, and add a new test for
  this specific failure, and mark it as an expected failure for the
  relevant cases.

    M ./tests/ghc-regress/concurrent/should_run/all.T +8
    M ./tests/ghc-regress/concurrent/should_run/conc014.hs -1 +8
    M ./tests/ghc-regress/concurrent/should_run/conc015.hs -1 +8
    M ./tests/ghc-regress/concurrent/should_run/conc017.hs -1 +8
    A ./tests/ghc-regress/concurrent/should_run/conc058.hs
    A ./tests/ghc-regress/concurrent/should_run/conc058.stderr