Add smm-variable standalone service context

To support service-level testing of the smm-variable service in
a native PC environment, a standalone service context has been
added that allows the smm-variable service to be discovered
and used via the service locator API exposed by libts.

Signed-off-by: Julian Hall <julian.hall@arm.com>
Change-Id: I1998c0a80f325938498f5edf7b36abd170e06cc8
diff --git a/deployments/component-test/component-test.cmake b/deployments/component-test/component-test.cmake
index 2fdc857..a0233c3 100644
--- a/deployments/component-test/component-test.cmake
+++ b/deployments/component-test/component-test.cmake
@@ -45,6 +45,7 @@
 		"components/service/locator/standalone/services/protected-storage"
 		"components/service/locator/standalone/services/test-runner"
 		"components/service/locator/standalone/services/attestation"
+		"components/service/locator/standalone/services/smm-variable"
 		"components/service/discovery/client"
 		"components/service/discovery/provider"
 		"components/service/discovery/provider/serializer/packed-c"