Test: Add a Secure Partition for multi-core test

Add a Secure Partition for multi-core topology specific tests.
Add a dummy service and corresponding signal.
Update the manifest files.

Change-Id: Id0d9530d54afab76053bd74989f88902bfbbdd9b
Signed-off-by: David Hu <david.hu@arm.com>
diff --git a/interface/include/tfm_veneers.h b/interface/include/tfm_veneers.h
index 1eefbf0..f4f182c 100644
--- a/interface/include/tfm_veneers.h
+++ b/interface/include/tfm_veneers.h
@@ -150,6 +150,10 @@
 psa_status_t tfm_tfm_secure_client_2_call_veneer(psa_invec *in_vec, size_t in_len, psa_outvec *out_vec, size_t out_len);
 #endif /* TFM_PARTITION_TEST_SECURE_SERVICES */
 
+#ifdef TFM_MULTI_CORE_TEST
+/******** TFM_SP_MULTI_CORE_TEST ********/
+#endif /* TFM_MULTI_CORE_TEST */
+
 #ifdef __cplusplus
 }
 #endif