[ecj] Patch: FYI: don't re-use maintainer-mode

[Gary Benson]

Tom Tromey wrote:
> I'm checking this in on the gcj-eclipse-merge-branch.
> 
> I think we don't want to reuse --enable-maintainer-mode for
> compiling the java sources, since this would negatively impact
> other gcc developers who have no interest in navigating this.
> 
> So, I've add a new configure option --enable-java-maintainer-mode
> which controls these bits.

Good call :)