hg: valhalla/valhalla/jdk: Fix bug in unreflectWithers to correctly support arguments whose values

[paul.sandoz at oracle.com]

Changeset: f0d2ba859ce1
Author:    psandoz
Date:      2017-07-06 14:37 -0700
URL:       http://hg.openjdk.java.net/valhalla/valhalla/jdk/rev/f0d2ba859ce1

Fix bug in unreflectWithers to correctly support arguments whose values
take double slots.

! src/java.base/share/classes/jdk/experimental/value/ValueType.java
! test/valhalla/mvt/UnreflectWithersTest.java
! test/valhalla/mvt/vector/VectorUtils.java