[gtk+] docs: add new GtkOverlay methods to gtk3-sections.txt

[Cosimo Cecchi <cosimoc src gnome org>]

commit 1e6ccf5c86e34df543206e61e0ab93d1925d9f79
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Tue Jun 16 11:58:46 2015 -0700

    docs: add new GtkOverlay methods to gtk3-sections.txt
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750568

 docs/reference/gtk/gtk3-sections.txt |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/gtk3-sections.txt b/docs/reference/gtk/gtk3-sections.txt
index 273799f..dd9cdf6 100644
--- a/docs/reference/gtk/gtk3-sections.txt
+++ b/docs/reference/gtk/gtk3-sections.txt
@@ -7773,6 +7773,8 @@ GtkOverlayClass
 
 gtk_overlay_new
 gtk_overlay_add_overlay
+gtk_overlay_add_pass_through_overlay
+gtk_overlay_reorder_overlay
 
 <SUBSECTION Standard>
 GTK_TYPE_OVERLAY