MDEV-11663 Create services for functionality used by plugins

Added service for
- encryption (AES)
- error reporting, e.g my_printf_error()

libservices/my_print_error_service.c

@@ -0,0 +1,17 @@
+/* Copyright (c) 2016 MariaDB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */
+
+#include <service_versions.h>
+SERVICE_VERSION my_print_error_service= (void*)VERSION_my_print_error;