8334170: bug6492108.java test failed with exception Image comparison failed at (0, 0) for image 4

Reviewed-by: aivanov, azvegint

test/jdk/com/sun/java/swing/plaf/gtk/bug6492108.java

@@ -109,6 +109,7 @@ public class bug6492108 extends SwingTestHelper {
         } catch (Throwable t) {
             fail("Problem creating text components");
         }
+        setDelay(50);
         return panel;
     }