Fix Jim interpreter memory leak

Change-Id: I71d7d97e7dc315c42fc43b65cb5fcecd7bdfb581
Signed-off-by: Marc Schink <openocd-dev@marcschink.de>
Reviewed-on: http://openocd.zylin.com/2959
Tested-by: jenkins
Reviewed-by: Tomas Vanek <vanekt@fbl.cz>

src/openocd.c

@@ -344,8 +344,8 @@ int openocd_main(int argc, char *argv[])
 
 	unregister_all_commands(cmd_ctx, NULL);
 
-	/* free commandline interface */
-	command_done(cmd_ctx);
+	/* Shutdown commandline interface */
+	command_exit(cmd_ctx);
 
 	adapter_quit();