[8u] RFA 8139507: WARNING: Could not open/create prefs root node Software\JavaSoft\Prefs

[David Buck]

Hi!

Please approve the backport of this small JDK 9 fix to 8u-dev.

bug report:
https://bugs.openjdk.java.net/browse/JDK-8139507

JDK 9 changeet:
http://hg.openjdk.java.net/jdk9/jdk9/jdk/rev/752024872cac

code review:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2016-June/041697.html

The JDK 9 fix applies as-is to the 8u-dev source code after path 
unshuffling.


Cheers,
-Buck