[gtk+] mir: Add missing reference to gdkmir-private.h

[Rico Tzschichholz <ricotz src gnome org>]

commit 07efae7288e4b50cb2f78d340bc7fc1438ef63fa
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Sun Dec 28 13:34:16 2014 +0100

    mir: Add missing reference to gdkmir-private.h

 gdk/mir/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gdk/mir/Makefile.am b/gdk/mir/Makefile.am
index d71c377..ea2dac8 100644
--- a/gdk/mir/Makefile.am
+++ b/gdk/mir/Makefile.am
@@ -32,6 +32,7 @@ libgdk_mir_la_SOURCES =       \
        gdkmirwindow.c  \
        gdkmirwindowimpl.c      \
        gdkmir-debug.c  \
+       gdkmir-private.h \
        gdkmir.h
 
 libgdkinclude_HEADERS = \