Use correct years for libstdc++-v3 ChangeLog files

[Maciej W. Rozycki]

On Tue, 24 May 2005, Ian Lance Taylor wrote:

> This trivial patch fixes up the years for the ChangeLog files in
> libstdc++-v3.  Specifically, it moves entries for 1998 and 1999 out of
> ChangeLog-2000 into new files ChangeLog-1998 and ChangeLog-1999.

 While doing this could you please consider fixing that entry referring to 
the year 999?

  Maciej