8339931: Update problem list for WindowUpdateFocusabilityTest.java

8202926: Test java/awt/Focus/WindowUpdateFocusabilityTest/WindowUpdateFocusabilityTest.html fails

Reviewed-by: sgehwolf
Backport-of: 5fada9567731c4538c7d3744fd655ea97420147e

Author: RadekCap

test/jdk/ProblemList.txt

@@ -445,7 +445,7 @@ java/awt/image/VolatileImage/CustomCompositeTest.java 8199002 windows-all,linux-
 java/awt/image/VolatileImage/GradientPaints.java 8199003 linux-all
 java/awt/JAWT/JAWT.sh 8197798 windows-all
 java/awt/Debug/DumpOnKey/DumpOnKey.java 8202667 windows-all
-java/awt/Focus/WindowUpdateFocusabilityTest/WindowUpdateFocusabilityTest.java 8202926 linux-all
+java/awt/Focus/WindowUpdateFocusabilityTest/WindowUpdateFocusabilityTest.java 8339929 linux-all
 java/awt/datatransfer/ConstructFlavoredObjectTest/ConstructFlavoredObjectTest.java 8202860 linux-all
 java/awt/FileDialog/FilenameFilterTest/FilenameFilterTest.java 8202882 linux-all
 java/awt/Frame/FramesGC/FramesGC.java 8079069 macosx-all