hg: jdk9/sandbox/jdk: Make sure java -version do not crash due to demo code.

[magnus.ihse.bursie at oracle.com]

Changeset: ff53c09fffe1
Author:    ihse
Date:      2015-03-04 01:32 +0100
URL:       http://hg.openjdk.java.net/jdk9/sandbox/jdk/rev/ff53c09fffe1

Make sure java -version do not crash due to demo code.

! src/java.base/share/native/libjava/jdk_util.c