[8u60] Request for approval for CR 8066504: GetVersionEx in java.base/windows/native/libjava/java_props_md.c might not get correct Windows version

[Roger Riggs]

Please approve this backport to correctly set os.name and os.version for 
Windows 10.
It differs from the corresponding JDK9 changeset only in the unshuffle and
correctly declaring local variables to the start of blocks.
It passed JPRT and been manually checked on a Windows 10 system.

Webrev:
    http://cr.openjdk.java.net/~rriggs/webrev-jdk8-ver-8066504/

Issue:
    https://bugs.openjdk.java.net/browse/JDK-8066504

jdk9 changeset:
http://hg.openjdk.java.net/jdk9/dev/jdk/rev/0bc25016547c

Thanks, Roger