hg: jdk9/sandbox/nashorn: 8134484: disallow backquotes as heredoc end marker delimiters

[chris.hegarty at oracle.com]

Changeset: d61744c0d1d2
Author:    mhaupt
Date:      2015-08-26 13:11 +0200
URL:       http://hg.openjdk.java.net/jdk9/sandbox/nashorn/rev/d61744c0d1d2

8134484: disallow backquotes as heredoc end marker delimiters
Reviewed-by: attila, sundar

! src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/parser/Lexer.java
! test/script/nosecurity/JDK-8073613.js
! test/script/nosecurity/JDK-8073613.js.EXPECTED