patch applied (packages/base): Add System.Timeout to base.cabal

[Neil Mitchell]

Hi

> Sun May 27 05:33:14 PDT 2007  Ian Lynagh <igloo at earth.li>
>   * Add System.Timeout to base.cabal
>   Filtered out for non-GHC by Setup.hs.

Why shouldn't non GHC compilers provides this, but with an interface
that simply never times out?

It seems that base should present one consistent interface on all
compilers, if at all possible! Otherwise you are just going to trip
people up later.

Thanks

Neil