RFR [9] 8153286: Move sun.misc.GC to java.rmi ( sun.rmi.transport )

[Chris Hegarty]

sun.misc.GC is not "Critical APIs", as defined by JEP 260, so should
be moved out of sun.misc and placed into a more appropriate package,
where it can be encapsulated.

Since GC is only used by RMI, I proposed to move it to the java.rmi
module. Since it has a native component, and no other code in java.rmi
has, then a new small native library is required.

http://cr.openjdk.java.net/~chegar/8153286/
https://bugs.openjdk.java.net/browse/JDK-8153286

-Chris.