Fix build bustage.

config/autoconf.mk.in

@@ -33,9 +33,10 @@ TIMER_LIBS = -l$(TIMER_LIB_NAME)
 
 MOZ_XLIBRGB_LDFLAGS = @MOZ_XLIBRGB_LDFLAGS@
 MOZ_USING_XLIBRGB = @MOZ_USING_XLIBRGB@
+endif
+
 MOZ_GFX_TOOLKIT_LDFLAGS     = -lgfx_$(MOZ_GFX_TOOLKIT) $(MOZ_XLIBRGB_LDFLAGS)
 MOZ_WIDGET_TOOLKIT_LDFLAGS	= -lwidget_$(MOZ_WIDGET_TOOLKIT)
-endif
 
 MOZ_SECURITY 	= @MOZ_SECURITY@
 MOZ_JAVA	= @MOZ_JAVA@