[gtk+] gtkx: add missing header

[Victor Manuel Jaquez Leal <vjaquez src gnome org>]

commit 64f26db038d8d959516183a9e4cfd9150bad9145
Author: Víctor Manuel Jáquez Leal <vjaquez igalia com>
Date:   Mon Feb 2 12:54:37 2015 +0100

    gtkx: add missing header
    
    The header file gdk/x11/gdkx-autocleanups.h is not installed, but
    it is required by gdkx.h
    
    https://bugzilla.gnome.org/show_bug.cgi?id=743640

 gdk/x11/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/x11/Makefile.am b/gdk/x11/Makefile.am
index 36e39f0..c488a31 100644
--- a/gdk/x11/Makefile.am
+++ b/gdk/x11/Makefile.am
@@ -62,6 +62,7 @@ libgdkinclude_HEADERS =       \
        gdkx.h
 
 libgdkx11include_HEADERS =     \
+       gdkx-autocleanups.h     \
        gdkx11applaunchcontext.h \
        gdkx11cursor.h          \
        gdkx11device.h          \