RFR: 8194739: JDK9u: Zero port of 8174962: Better interface invocations

[Severin Gehwolf]

On Mon, 2018-01-22 at 13:46 +0000, Andrew Haley wrote:
> Fixes the breakage to Zero caused by 8174962: Better interface
> invocations.
> 
> http://cr.openjdk.java.net/~aph/8194739/

Zero version 9.0.4 (build 11) + patch builds fine for me in all
variants (release/fastdebug/slowdebug). It was broken pre-patch, so +1
from me.

Thanks,
Severin