[8u40] review request: RT-39602 Shape.setSmooth() can leak setting to any following Region nodes

[Jim Graham]

Jira: https://javafx-jira.kenai.com/browse/RT-39602
webrev: http://cr.openjdk.java.net/~flar/RT-39602/webrev.00/

This is the fix for the true underlying problem behind RT-39590.  It's a 
simple application of "restore your state in the rendering methods" to 
the new AA flag in NGShape...

			...jim