Update logic to choose manifest from manifest list to check
for os version on Windows. Separate the logic for windows
and unix to keep unix logic the same.
Signed-off-by: Derek McGowan <derek@mcgstyle.net>
(cherry picked from commit 38aef56e1fcb8ea318df98c89cf002267b88a136)
Signed-off-by: John Stephens <johnstep@docker.com>