7035109: Regression: awt SplashScreen/test18.sh fails - missing mapfile entry

Reviewed-by: alanb, ksrini

make/sun/xawt/mapfile-vers

 #
-# Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2002, 2011, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -226,6 +226,7 @@ SUNWprivate_1.1 {
 	Java_sun_awt_X11GraphicsConfig_destroyBackBuffer;
 	Java_sun_awt_X11GraphicsConfig_swapBuffers;
 	Java_sun_awt_X11GraphicsConfig_isTranslucencyCapable;
+        Java_sun_awt_X11_XToolkit_getTrayIconDisplayTimeout;
         Java_java_awt_Insets_initIDs;
         Java_java_awt_KeyboardFocusManager_initIDs;
         Java_java_awt_Font_initIDs;