patch applied (ghc): shutdownCapability(): don' t bail out after 50 iterations

[Simon Marlow]

Fri Aug 25 03:02:44 PDT 2006  Simon Marlow <simonmar at microsoft.com>
  * shutdownCapability(): don't bail out after 50 iterations
  See comments for details.  Fixes assertion failures in stage 3 build
  which appeared after recent closeMutex() addidion.  May fix other
  shutdown issues.

    M ./rts/Capability.c -1 +7