Don't warn about deprecations in deprecated/

We know we are deprecated here, no need to warn.

gtk/deprecated/gtkfontsel.c

@@ -31,6 +31,8 @@
 
 #include "config.h"
 
+#define GDK_DISABLE_DEPRECATION_WARNINGS
+
 #include <stdlib.h>
 #include <glib/gprintf.h>
 #include <string.h>

gtk/deprecated/gtkstyle.c

@@ -25,6 +25,9 @@
  */
 
 #include "config.h"
+
+#define GDK_DISABLE_DEPRECATION_WARNINGS
+
 #include <math.h>
 #include <stdlib.h>
 #include <string.h>