[gtk+] docs: Fix make dist

[Rico Tzschichholz <ricotz src gnome org>]

commit 0c4dc3c15702a8daff58e63211235d91ec19b32e
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Tue May 20 08:11:44 2014 +0200

    docs: Fix make dist

 docs/reference/gtk/Makefile.am |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/docs/reference/gtk/Makefile.am b/docs/reference/gtk/Makefile.am
index 8f44cc8..8206452 100644
--- a/docs/reference/gtk/Makefile.am
+++ b/docs/reference/gtk/Makefile.am
@@ -152,6 +152,7 @@ content_files =                                     \
        windows.sgml                            \
        x11.sgml                                \
        gtk3-demo.xml                           \
+       gtk3-widget-factory.xml                 \
        gtk-query-immodules-3.0.xml             \
        gtk-update-icon-cache.xml               \
        gtk-launch.xml                          \
@@ -449,6 +450,7 @@ man_MANS =                          \
        gtk-update-icon-cache.1         \
        gtk-launch.1                    \
        gtk3-demo.1                     \
+       gtk3-widget-factory.1           \
        broadwayd.1
 
 if ENABLE_MAN