dmeventd: resolve compilation of vdo status parsing

A bit of chicken & egg problem - dmeventd needs to use old libdm library.
VDO is only part of new device_mapper internal library.

So include directly source file for parsing status - this fixes usability
problem of VDO plugin introduced with previous Makefile reshaping
patchset.

NOTE: source file needs to be keep then compilable in both environments.

Also add missing copyright header.

daemons/dmeventd/plugins/vdo/dmeventd_vdo.c

@@ -15,7 +15,9 @@
 #include "lib/misc/lib.h"
 #include "daemons/dmeventd/plugins/lvm2/dmeventd_lvm.h"
 #include "daemons/dmeventd/libdevmapper-event.h"
-#include "device_mapper/vdo/target.h"
+
+/* Use parser from new device_mapper library */
+#include "device_mapper/vdo/status.c"
 
 #include <sys/wait.h>
 #include <stdarg.h>

device_mapper/vdo/status.c

@@ -1,8 +1,26 @@
-#include "configure.h"
-#include "target.h"
+/*
+ * Copyright (C) 2018 Red Hat, Inc. All rights reserved.
+ *
+ * This file is part of the device-mapper userspace tools.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU Lesser General Public License v.2.1.
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
 
+/* Note: this object is also used by VDO dmeventd plugin for parsing status */
+/* File could be included by VDO plugin and can use original libdm library */
+#ifndef LIB_DMEVENT_H
+#include "configure.h"
 // For DM_ARRAY_SIZE!
 #include "device_mapper/all.h"
+#endif
+
+#include "device_mapper/vdo/target.h"
 #include "base/memory/zalloc.h"
 
 #include <ctype.h>