hg: panama/dev: Fix issues related to library loading and void type

[henry.jen at oracle.com]

Changeset: 36a9696fad6e
Author:    henryjen
Date:      2018-06-03 22:40 -0700
URL:       http://hg.openjdk.java.net/panama/dev/rev/36a9696fad6e

Fix issues related to library loading and void type

! src/java.base/share/classes/java/lang/ClassLoader.java
! src/java.base/share/classes/jdk/internal/nicl/Util.java
+ test/jdk/com/sun/tools/jextract/EmptyStructTest.java
+ test/jdk/com/sun/tools/jextract/emptyStruct.h
! test/jdk/java/nicl/BindLookupTest.java
! test/jdk/java/nicl/types/PointerTest.java
! test/jdk/java/nicl/types/libPointers.c