Add simple test to ensure accessor is working

Signed-off-by: Paul Elliott <paul.elliott@arm.com>
diff --git a/tests/suites/test_suite_ssl.data b/tests/suites/test_suite_ssl.data
index eb1b8f4..86e84bb 100644
--- a/tests/suites/test_suite_ssl.data
+++ b/tests/suites/test_suite_ssl.data
@@ -4779,3 +4779,6 @@
 
 Test configuration of groups for DHE through mbedtls_ssl_conf_groups()
 conf_group:
+
+Test accessor into timing_delay_context
+timing_accessor