hg: jdk9/sandbox/nashorn: 8140759: add ES6 template literal test

[chris.hegarty at oracle.com]

Changeset: 1ceda730b9a3
Author:    mhaupt
Date:      2015-10-29 11:37 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/nashorn/rev/1ceda730b9a3

8140759: add ES6 template literal test
Reviewed-by: hannesw, sundar
Contributed-by: andreas.woess at oracle.com

+ test/script/basic/es6/template-literals.js
+ test/script/basic/es6/template-literals.js.EXPECTED