test(chat): include EVP declarations explicitly in avatar SQL fixture

tests/test_group_avatar_sql.c

@@ -4,6 +4,7 @@
 #include "../lib/debug_config.h"
 #include <assert.h>
 #include <stdlib.h>
+#include <openssl/evp.h>
 
 static int fail_hash;
 static unsigned events;