patch applied (ghc-6.8/ghc): Define _XOPEN_SOURCE to be 500; partially fixes #2342

[Ian Lynagh]

Fri Jun  6 04:48:40 PDT 2008  Ian Lynagh <igloo at earth.li>
  * Define _XOPEN_SOURCE to be 500; partially fixes #2342

    M ./includes/Stg.h -2 +3

View patch online:
http://darcs.haskell.org/ghc-6.8/ghc/_darcs/patches/20080606114840-3fd76-9887c8858f3896e1c5f59a2b59d9b6a6e82e70f7.gz