Add idivine.h, which is missing from DirectFB tarballs

The idivine.h file was taken from the DirectFB Git repository.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/lib/divine/idivine.h
===================================================================
--- /dev/null
+++ b/lib/divine/idivine.h
@@ -0,0 +1,54 @@
+/*
+   (c) Copyright 2012-2013  DirectFB integrated media GmbH
+   (c) Copyright 2001-2013  The world wide DirectFB Open Source Community (directfb.org)
+   (c) Copyright 2000-2004  Convergence (integrated media) GmbH
+
+   All rights reserved.
+
+   Written by Denis Oliver Kropp <dok@directfb.org>,
+              Andreas Shimokawa <andi@directfb.org>,
+              Marek Pikarski <mass@directfb.org>,
+              Sven Neumann <neo@directfb.org>,
+              Ville Syrjälä <syrjala@sci.fi> and
+              Claudio Ciccani <klan@users.sf.net>.
+
+   This library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2 of the License, or (at your option) any later version.
+
+   This library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with this library; if not, write to the
+   Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+*/
+
+
+
+#ifndef __IDIVINE_H__
+#define __IDIVINE_H__
+
+#include <divine.h>
+
+/*
+ * private data struct of IDiVine
+ */
+typedef struct {
+     int                         ref;      /* reference counter */
+
+     DiVine                     *divine;
+} IDiVine_data;
+
+/*
+ * IDiVine constructor/destructor
+ */
+DFBResult IDiVine_Construct( IDiVine *thiz );
+
+void      IDiVine_Destruct ( IDiVine *thiz );
+
+#endif