libiberty: V3 ABI Java symbol demangling

[Bryce McKinlay]

The changeover to the V3 ABI broke Java symbol demangling in GDB. This
patch changes cplus_demangle() to use the V3 ABI demangling code for
Java symbols. cplus_demangle_v3 doesn't know how to output symbols in
Java-style yet, but C++ style is definitely better than nothing.

ok to commit?

will this automatically propagate to GDB or do I need to submit it to
them as well?

regards

  [ bryce ]