hg: jdk10/hs/hotspot: 8178813: Add test for G1 pre-barrier on dereference of weak JNI handles

[kim.barrett at oracle.com]

Changeset: 47f9461b6374
Author:    kbarrett
Date:      2017-05-11 23:41 -0400
URL:       http://hg.openjdk.java.net/jdk10/hs/hotspot/rev/47f9461b6374

8178813: Add test for G1 pre-barrier on dereference of weak JNI handles
Summary: Add regression test.
Reviewed-by: mgerdin, tschatzl, pliden

! make/test/JtregNative.gmk
+ test/gc/g1/TestJNIWeakG1/TestJNIWeakG1.java
+ test/gc/g1/TestJNIWeakG1/libTestJNIWeakG1.c