7u60 Request for phase 2 approval for CR 8020191 - System.getProperty( " os.name " ) returns " Windows NT (unknown) " on Windows 8.1

[Miroslaw Niemiec]

Jira bug:
https://bugs.openjdk.java.net/browse/JDK-8020191

This is a direct backport from 8 to 7. No changes needed to the original 
webrev:

http://cr.openjdk.java.net/~uta/openjdk-webrevs/JDK-8020191/webrev.01/  <http://cr.openjdk.java.net/%7Euta/openjdk-webrevs/JDK-8020191/webrev.01/>

Original 8 review request:
http://mail.openjdk.java.net/pipermail/core-libs-dev/2013-August/019508.html

webrev for 7:
http://sa.sfbay.sun.com/projects/corelibs_data/7u-dev/8020191.0/

This is a low risk fix which helps us better support windows 8.1 in 
jdk7u. In JDK 8 since August 2013.