patch applied (packages/base): Add traceEvent :: String -> IO ()

[Simon Marlow]

Fri Sep 25 07:12:57 PDT 2009  Simon Marlow <marlowsd at gmail.com>
  * Add traceEvent :: String -> IO ()
  Ignore-this: 8b1888bbf9682ffba13f815b6000e4b1
  For emitting an event via the RTS tracing framework

    M ./GHC/Exts.hs -1 +13

View patch online:
http://darcs.haskell.org/packages/base/_darcs/patches/20090925141257-12142-2e0eaeebb51b14879e3b7b190e14e294a95fd3d8.gz