fix(invalid-access): fix the build failures

Signed-off-by: Manish Pandey <manish.pandey2@arm.com>
Change-Id: I098cd72b43b8571c81bdbc9b2ca9db0784c91e90
diff --git a/tftf/tests/tests-invalid-access.mk b/tftf/tests/tests-invalid-access.mk
index 8202c20..9cda78c 100644
--- a/tftf/tests/tests-invalid-access.mk
+++ b/tftf/tests/tests-invalid-access.mk
@@ -12,6 +12,7 @@
 TESTS_SOURCES	+=							\
 	$(addprefix tftf/tests/runtime_services/host_realm_managment/,	\
 		host_realm_rmi.c					\
+		host_realm_helper.c					\
 	)
 
 TESTS_SOURCES	+=							\
@@ -20,4 +21,4 @@
 		ffa_helpers.c						\
 		spm_common.c						\
 		test_ffa_setup_and_discovery.c				\
-)
\ No newline at end of file
+)