Tweak NQP.nqp to get it to mostly build.

Took the JVM-based version rather than the Parrot-based one, which
gets rid of the pir::. Tweaked the NQP::Ops bit, but still some bits
to add back in the future. Also commented out a section missing an
nqp:: op. And with that, we get a NQP.moarvm out.