glib, gobject: Annotate deprecated types and enumerators

Use the new `GLIB_DEPRECATED_{TYPE,ENUMERATOR}*` macros to annotate types
and enumerators as deprecated, rather than using `G_DISABLE_DEPRECATED`.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

glib/gutils.c

@@ -218,6 +218,7 @@ _glib_get_dll_directory (void)
  *
  * Deprecated:2.32: It is best to avoid g_atexit().
  */
+G_GNUC_BEGIN_IGNORE_DEPRECATIONS
 void
 g_atexit (GVoidFunc func)
 {
@@ -232,6 +233,7 @@ g_atexit (GVoidFunc func)
                g_strerror (errsv));
     }
 }
+G_GNUC_END_IGNORE_DEPRECATIONS
 
 /* Based on execvp() from GNU Libc.
  * Some of this code is cut-and-pasted into gspawn.c