[gtkmm] Regenerate gtk_signals.defs

[Kjell Ahlstedt <kjellahl src gnome org>]

commit 39706d44f9912838c47615063183434381f44c19
Author: Kjell Ahlstedt <kjellahlstedt gmail com>
Date:   Tue Jul 25 16:26:15 2017 +0200

    Regenerate gtk_signals.defs

 gtk/src/gtk_signals.defs |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/gtk/src/gtk_signals.defs b/gtk/src/gtk_signals.defs
index c40384f..b9a728d 100644
--- a/gtk/src/gtk_signals.defs
+++ b/gtk/src/gtk_signals.defs
@@ -255,6 +255,15 @@
 
 ;; From GtkActionBar
 
+(define-property revealed
+  (of-object "GtkActionBar")
+  (prop-type "GParamBoolean")
+  (docs "Controls whether the action bar shows its contents or not")
+  (readable #t)
+  (writable #t)
+  (construct-only #f)
+)
+
 ;; From GtkAdjustment
 
 (define-signal changed