<AWT Dev> RFR: 8241797 Add some tests to the problem list

[Sergey Bylokhov]

Hello.
Please review the fix for jdk/client.

Bug: https://bugs.openjdk.java.net/browse/JDK-8241797
Fix: http://cr.openjdk.java.net/~serb/8241797/webrev.00

I have run the tests on a Windows platform in a loop for a
few days and tried to catch some unstable or known issues,
in this change, I would like to add some known issues to the
problem list.

-- 
Best regards, Sergey.