RFR 9: JDK-8168862:Tighten permissions granted to the jdk.zipfs module

[Xueming Shen]

Please help review the change for

issue: https://bugs.openjdk.java.net/browse/JDK-8168862
webre: http://cr.openjdk.java.net/~sherman/8168862

The change is to tighten the permission to read "os.name" only.

Thanks,
Xueming