Pre-RFR(L): 8206139: [lworld] Re-enable calling convention optimizations

[Tobias Hartmann]

On 30.11.18 16:59, Tobias Hartmann wrote:
> - *All* tests pass on Linux and Mac but I see some weird compilation failures on Windows.

I've fixed the Windows issues as well (missing bounds check on a BasicType array that only showed up
on Windows because on Linux and Mac the accessed memory area was luckily zero) and updated the
webrev in place. All tests pass now.

Thanks,
Tobias