RFR [9] Moved sun.misc.ProxyGenerator to jdk.internal.reflect

[Chris Hegarty]

No new code here, just giving sun.misc.ProxyGenerator a more appropriate
location, in jdk.internal.reflect ( since it contains the code to generate a dynamic
proxy class for the java.lang.reflect.Proxy ).

http://cr.openjdk.java.net/~chegar/proxyGeneratorWebrev/webrev/

Note: ProxyGenerator could be moved into java.lang.reflect, as a 
package-private class, but I see no reason to move it into an exported
package, and a package that it not on the restricted package list. 

-Chris.