hg: valhalla/valhalla/jdk: Add findConstructor. Calls constructor on VCC and then unboxes to DVT.

[paul.sandoz at oracle.com]

Changeset: 0a380619091c
Author:    psandoz
Date:      2017-06-27 22:25 -0700
URL:       http://hg.openjdk.java.net/valhalla/valhalla/jdk/rev/0a380619091c

Add findConstructor. Calls constructor on VCC and then unboxes to DVT.

! src/java.base/share/classes/jdk/experimental/value/ValueType.java
+ test/valhalla/mvt/ConstructorTest.java
+ test/valhalla/mvt/Interval.java