hg: panama/dev: 8237762: Add platform dependent MemoryLayout constants

[jorn.vernee at oracle.com]

Changeset: 5e8d3e6df64c
Author:    jvernee
Date:      2020-01-23 18:45 +0100
URL:       https://hg.openjdk.java.net/panama/dev/rev/5e8d3e6df64c

8237762: Add platform dependent MemoryLayout constants
Reviewed-by: forax, mcimadamore

! src/jdk.incubator.foreign/share/classes/jdk/incubator/foreign/MemoryLayouts.java
! test/jdk/java/foreign/CallGeneratorHelper.java
! test/jdk/java/foreign/NativeTestHelper.java
! test/jdk/java/foreign/StdLibTest.java
! test/jdk/java/foreign/TestUpcall.java
! test/jdk/java/foreign/TestVarArgs.java