[gtk+] gtk: Fix make dist

[Rico Tzschichholz <ricotz src gnome org>]

commit 86d4c26420dfaba355d4993b2e0dc2fbea36a409
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sat May 24 09:24:46 2014 +0200

    gtk: Fix make dist

 gtk/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/Makefile.am b/gtk/Makefile.am
index 46d2ed0..cb3f0cc 100644
--- a/gtk/Makefile.am
+++ b/gtk/Makefile.am
@@ -584,6 +584,7 @@ gtk_private_h_sources =             \
        gtkgesturemultipressprivate.h   \
        gtkgesturepanprivate.h  \
        gtkgesturerotateprivate.h       \
+       gtkgesturesingleprivate.h       \
        gtkgestureswipeprivate.h        \
        gtkgesturezoomprivate.h \
        gtkheaderbarprivate.h   \