RFR 8187782: no ant build artifact should be produced under make/nashorn directory

[Sundararajan Athijegannathan]

Please review.

Bug: https://bugs.openjdk.java.net/browse/JDK-8187782
Webrev: http://cr.openjdk.java.net/~sundar/8187782/webrev.00/

Thanks,
-Sundar