patch to robustify gnuv3_rtti_type

[Daniel Berlin]

>
> What is the current status of support for namepace-handling in gdb?
> If we fix gcj so it emits the same debug into as g++ (i.e.
> 'java.lang.Class' is emitted as plain 'Class'), can gdb "do the
> right thing" based on the mangled names?  If not, can gdb handle
> dwarf2 namespace information (which g++ currently supresses)?
No, it can't, which is why i still haven't committed a patch to add it 
that Jason approved eons ago.
I'm going to just add a -gdwarf-3 switch, and make it dependent on that.

> -- 	--Per Bothner
> per@bothner.com   http://www.bothner.com/per/