RFR JDK-8071338: Move policytool from JRE to JDK

[Weijun Wang]

Hi All

Please review this change at

root: http://cr.openjdk.java.net/~weijun/8071338/root/webrev.00/
jdk:  http://cr.openjdk.java.net/~weijun/8071338/jdk/webrev.00/

No actual java code change, just move everything inside the 
s.s.t.policytool into another module. There are other make/test changes 
though.

Thanks
Max