hg: jdk10/master: 8186180: Symbol.__proto__ results in error with format string placeholder

[hannes.wallnoefer at oracle.com]

Changeset: 82d45783c133
Author:    hannesw
Date:      2017-09-22 11:52 +0200
URL:       http://hg.openjdk.java.net/jdk10/master/rev/82d45783c133

8186180: Symbol.__proto__ results in error with format string placeholder
Reviewed-by: sundar, hannesw
Contributed-by: priya.lakshmi.muthuswamy at oracle.com

! src/jdk.scripting.nashorn/share/classes/jdk/nashorn/internal/objects/NativeSymbol.java
+ test/nashorn/script/basic/es6/JDK-8186180.js
+ test/nashorn/script/basic/es6/JDK-8186180.js.EXPECTED