[10] Review request: 8193161: NullPointerException when generating image/installer on Linux

[victor . drozdov]

Alexander,

Please review the changes about fixing NPE when generating an image or 
installer on Linux.

JIRA: https://bugs.openjdk.java.net/browse/JDK-8193161
Webrev: http://cr.openjdk.java.net/~vdrozdov/JDK-8193161/webrev.00/

--Victor