hg: jdk9/sandbox/nashorn: 8144230: Add a sample for pluggable dynalink linker

[chris.hegarty at oracle.com]

Changeset: e9c4c02337cc
Author:    sundar
Date:      2015-11-30 18:16 +0530
URL:       http://hg.openjdk.java.net/jdk9/sandbox/nashorn/rev/e9c4c02337cc

8144230: Add a sample for pluggable dynalink linker
Reviewed-by: hannesw, mhaupt

+ samples/DOMLinkerExporter.java
+ samples/META-INF/services/jdk.dynalink.linker.GuardingDynamicLinkerExporter
+ samples/dom_linker.js
+ samples/dom_linker_gutenberg.js