Request for approval: JDK-8027561 [macosx] Cleanup "may not respond to selector" warnings in native code

[Petr Pchelko]

Hello, 

This is a request to backport the fix from JDK9 to JDK 8u20.

The bug: https://bugs.openjdk.java.net/browse/JDK-8027561
JDK9 changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/d3c831d1d2e2
Webrev: http://cr.openjdk.java.net/~pchelko/9/8027561/webrev/
The review: http://mail.openjdk.java.net/pipermail/awt-dev/2013-December/006755.html

Thank you. 
With best regards. Petr.