PATCH: Document IRIX, Solaris, and Tru64 UNIX obsoletions for GCC 4.5

[Gerald Pfeifer]

On Fri, 29 Jan 2010, Rainer Orth wrote:
> Unless someone objects by mid next week, I plan to go ahead with the
> obsoletion of older IRIX, Solaris, and Tru64 UNIX releases announced
> before.  By that time, I'd like to commit the following.  I've taken the
> obsoletion section from the GCC 4.4 changes page, adapted as
> appropriate.
> 
> Ok?

Looks good, thanks.

Gerald