hg: panama/panama/jdk: Improve test coverage for Descriptor

[henry.jen at oracle.com]

Changeset: 0f3006d6bc82
Author:    henryjen
Date:      2016-03-21 22:31 -0700
URL:       http://hg.openjdk.java.net/panama/panama/jdk/rev/0f3006d6bc82

Improve test coverage for Descriptor

! src/java.base/share/classes/jdk/internal/nicl/types/Descriptor.java
! src/java.base/share/classes/jdk/internal/nicl/types/Pointer.java
! src/java.base/share/classes/jdk/internal/nicl/types/Types.java
! test/java/nicl/types/DescriptorTest.java