[ecj] Patch: FYI: merge in Classpath 0.93+

[Gary Benson]

Andrew Haley wrote:
> Tom Tromey writes:
> > > > Andrew, Gary -- please take a look at the new
> > > > VMStackWalker.firstNonNullClassLoader.  I copied this
> > > > in from upstream.
> > 
> > Andrew> Eww.  If that's used anywhere that matters, we have
> > Andrew> to fix it.
> > 
> > There's a few uses in Classpath:
[snip]
> 
> OK, definitely.  ObjectInputStream is very important,
> performance-wise.  We need another specialization in VMStackWalker.

Got it.

Cheers,
Gary