[at-spi2-core] test: fix compiler warning

[Mike Gorse <mgorse src gnome org>]

commit 383f8a47d9f3513a35964381b3d5b288961e71a8
Author: Mike Gorse <mgorse suse com>
Date:   Sat Aug 8 17:07:24 2020 -0500

    test: fix compiler warning

 test/memory.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/test/memory.c b/test/memory.c
index 5105fffc..2f53dd7f 100644
--- a/test/memory.c
+++ b/test/memory.c
@@ -1,4 +1,5 @@
 #include "atspi/atspi.h"
+#include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 #include <string.h>