Where to document supported versions of binutils?

[Andrew Cagney]

> We've learned that, on native i686-pc-linux-gnu, gdb has bugs
> with binutils prior to binutils 2.13.  I saw this happen in my
> test bed, and David Carlton also saw it happening on his system.
> 
> Where do we record this knowledge so that gdb users can see it?
> 
> There doesn't appear to be a obvious section in NEWS or README
> for information like this.

gdb/PROBLEMS :-)

Andrew