RFR: JDK-8058845 : Update JCE environment for build improvements

[Bradford Wetmore]

Hi Sean/Mandy/Erik/Magnus/Alan/David/others,

Please review:

     JDK-8058845 : Update JCE environment for build improvements
     http://cr.openjdk.java.net/~wetmore/8058845/

This change is to alleviate some of the overly-complicated steps we 
(Oracle) have in building and maintaining the JCE jar files in JDK 9. 
Besides the Makefiles and a class rename, there is very little change to 
the Open code for the OpenJDK Security folks.  The OpenJDK build folks 
shouldn't really notice any difference.

I do wish we could completely do away with this code completely, but we 
(Oracle and closed licensees) do still need to follow the regulations.

For the Iced Tea maintainers, this will necessitate a small incremental 
change to your JCE patch.

Thanks,

Brad