hg: jdk9/sandbox/nashorn: 8075604: jjs exits even when non-daemon threads are still active

[chris.hegarty at oracle.com]

Changeset: 2e640036000d
Author:    sundar
Date:      2015-03-20 20:04 +0530
URL:       http://hg.openjdk.java.net/jdk9/sandbox/nashorn/rev/2e640036000d

8075604: jjs exits even when non-daemon threads are still active
Reviewed-by: attila, jlaskey

! src/jdk.scripting.nashorn/share/classes/jdk/nashorn/tools/Shell.java