cmsdk: Fix cm system api stub generation.

Change-Id: I04287107d1f2cdfdf9c8cd7f5b713db3466239ec
diff --git a/Android.mk b/Android.mk
index 576b339..205eb4a 100644
--- a/Android.mk
+++ b/Android.mk
@@ -274,8 +274,8 @@
 
 # $(gen), i.e. framework.aidl, is also needed while building against the current stub.
 $(full_target): $(cm_framework_built) $(gen)
-$(INTERNAL_CM_PLATFORM_API_FILE): $(full_target)
-$(call dist-for-goals,sdk,$(INTERNAL_CM_PLATFORM_API_FILE))
+$(INTERNAL_CM_PLATFORM_SYSTEM_API_FILE): $(full_target)
+$(call dist-for-goals,sdk,$(INTERNAL_CM_PLATFORM_SYSTEM_API_FILE))
 
 # Documentation
 # ===========================================================