Patch to fix PR9861

[Andrew Haley]

TJ Laurenzo writes:
 > >  > I would think that it will be some years before non-free OS's (I am
 > >  > specifically thinking of things like the "companion cd" for
 > >  > Solaris) will include GCC 4.1 (or whichever version this patch
 > >  > makes its way into) anyway.
 > >
 > > Probably.  But what I don't want to happen is for them to include new
 > > gcc and old gdb.  It's a matter of release cycles.
 > 
 > Is it acceptable to get the changes to cp_demangle.c into mainline
 > prior to the rest?

Yes.  If Ian is happy with the new mangling scheme we should commit
this straight away.

Andrew.