hg: panama/panama/jdk: - Fix bug: should use same CodeFactory in case a header file encountered multiple times

[henry.jen at oracle.com]

Changeset: f42e35d93d13
Author:    henryjen
Date:      2016-05-06 10:00 -0700
URL:       http://hg.openjdk.java.net/panama/panama/jdk/rev/f42e35d93d13

- Fix bug: should use same CodeFactory in case a header file encountered multiple times
- Allow null for FunctionalInterface
- Temporary return null for FunctionalInterface return type
- Ignore function/variable declartion not in the main file

! src/java.base/share/classes/java/nicl/NativeLibrary.java
! src/java.base/share/classes/jdk/internal/nicl/MethodImplGenerator.java
! src/jdk.jextract/share/classes/com/sun/tools/jextract/Context.java
! src/jdk.jextract/share/classes/com/sun/tools/jextract/HeaderFile.java