[8u-dev] Backport request: 8078606: Deadlock in awt clipboard

[Anton Nashatyrev]

Hello,

     please approve the fix backport from jdk9 to jdk8u-dev. The patch 
was applied without any modifications.

     this is actually post commit request - sorry, pushed by mistake

Bug: https://bugs.openjdk.java.net/browse/JDK-8078606
Jdk9 Webrev: http://cr.openjdk.java.net/%7Eanashaty/8078606/webrev.00/
Jdk9 Changeset: http://hg.openjdk.java.net/jdk9/client/jdk/rev/a925105ec065
Jdk9 Review Thread: 
http://mail.openjdk.java.net/pipermail/awt-dev/2015-May/009343.html

Thanks!
Anton.