Bug#27406775 BACKPORT BUG#26846549 TO 5.7 (post-fix)

Problem
=======
The solaris11-sparc-64bit,community weekly build failed.

Analysis
========
Compiler complains that function "calloc" must have a prototype on
node_connection.h.
Indeed, node_connection.h does not include stdlib.h as required to use
calloc.
This has been fixed somewhere in the development from 5.7 to 8.0 because the
include is there on 8.0.
The fact that it has been compiling is most likely accidental.

Solution
========
Add #include <stdio.h> to node_connection.h.

Reviewed-by: Alfranio Correia <[email protected]>
Reviewed-by: Tiago Jorge <[email protected]>
RB: 18853

Author: tvale

rapid/plugin/group_replication/libmysqlgcs/src/bindings/xcom/xcom/node_connection.h

@@ -17,6 +17,8 @@
 #ifndef NODE_CONNECTION_H
 #define	NODE_CONNECTION_H
 
+#include <stdlib.h>
+
 #ifdef XCOM_HAVE_OPENSSL
 #include "openssl/ssl.h"
 #endif