8161740: [parfait] Memory leak in Java_sun_awt_UNIXToolkit_load_1gtk_1icon of awt_UNIXToolkit.c:132
Reviewed-by: serb, ssadetsky

8145547: [AWT/Swing] Conditional support for GTK 3 on Linux
Reviewed-by: prr, alexsch

8056216: Remove "sun" directory layer from libawt and common
Reviewed-by: erikj, ihse, coffeys