hg: panama/dev: 8202907: Consolidate the design and implementation of the nicl support.

[sundararajan.athijegannathan at oracle.com]

Changeset: cd7f16129e27
Author:    sundar
Date:      2018-06-06 19:09 +0530
URL:       http://hg.openjdk.java.net/panama/dev/rev/cd7f16129e27

8202907: Consolidate the design and implementation of the nicl support.
Padding as a leaf Layout and test case for struct with padding.
Reviewed-by: mcimadamore

+ src/java.base/share/classes/java/nicl/layout/Padding.java
! src/java.base/share/classes/jdk/internal/nicl/abi/sysv/x64/CallingSequenceBuilderImpl.java
! src/java.base/share/classes/jdk/internal/nicl/types/DescriptorParser.java
! src/jdk.jextract/share/classes/com/sun/tools/jextract/Utils.java
! test/jdk/com/sun/tools/jextract/simple.java
+ test/jdk/java/nicl/PaddedStructTest.java
+ test/jdk/java/nicl/libPaddedStruct.c