[7u60] Request for approval for 8027351: (ref) Private finalize method invoked in preference to protected superclass method

[Mandy Chung]

This is to request approval to backport 8027351 to 7u60.
    https://bugs.openjdk.java.net/browse/JDK-8027351
Other than the makefile change, the patch is straight backport from JDK 
8 changeset [1].

Webrev at:
http://cr.openjdk.java.net/~mchung/jdk7u/webrevs/8027351/webrev.00/

The build and tests are verified on all platforms.

Mandy
[1] http://hg.openjdk.java.net/jdk8/jdk8/jdk/rev/41d7ce111bd8