RFC: backport of JDK-8215756: Memory leaks in the AWT on macOS

[Simon Tooke]

Hello all,

I would like to backport the following bug into jdk8u-dev:

The patch is trivial, apart from the usual path changes.
I omitted one file change that was only a line ending difference, and fixed the copyright dates.

bug: https://bugs.openjdk.java.net/browse/JDK-8215756

jdk8u patch:  http://cr.openjdk.java.net/~stooke/webrevs/jdk8215756-jdk8u/

Original patch: http://hg.openjdk.java.net/jdk/client/rev/64e7a73195c1

Thanks for your time,

-Simon

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Simon Tooke
Principle Software Engineer,
Red Hat Canada   <https://www.redhat.com>