RFR JDK-8186227: jdk/nio/zipfs/ZeroDate.java fails on Windows with "IllegalArgumentException: Illegal character in opaque part at index 13"

[Xueming Shen]

Hi Martin,

Confirmed it fixed the issue on windows platforms.

issue: https://bugs.openjdk.java.net/browse/JDK-8186227
webrev: http://cr.openjdk.java.net/~sherman/8186227

Please help review the change.

Thanks,
Sherman