[Truffle] Convert longs to JRuby.
[Truffle] Tidy up some exception stuff.
[Truffle] Correct implementations of div and mod.
[Truffle] Use existing nodes for the dup and push sometimes involved in an argument splat.
[Truffle] Clear Hash#values with small linear storage for fast path.
Merge branch 'master' of jruby.org:jruby