hg: panama/dev: 8212920: Tweak StructByValueTest to verify for by-value semantics

[henry.jen at oracle.com]

Changeset: 4b634b7d0cdb
Author:    henryjen
Date:      2018-10-24 10:36 -0700
URL:       http://hg.openjdk.java.net/panama/dev/rev/4b634b7d0cdb

8212920: Tweak StructByValueTest to verify for by-value semantics
Reviewed-by: henryjen
Contributed-by: Jorn Vernee <jbvernee at xs4all.nl>

! test/jdk/java/foreign/StructByValueTest.java
! test/jdk/java/foreign/libstructbyvalue.c