Include cts-junit target for cts tests.

(cherry picked from commit 1949a41e70c70fd71fb8decf9fb2f98aab3b7198)

Change-Id: Ic1d05f0eb1ceb1ac732b57ba1322acd17758b8d3
diff --git a/core/tasks/cts.mk b/core/tasks/cts.mk
index 58bb235..82094b9 100644
--- a/core/tasks/cts.mk
+++ b/core/tasks/cts.mk
@@ -61,6 +61,7 @@
 
 
 CTS_TEST_JAR_LIST := \
+        cts-junit \
 	CtsJdwp
 
 # Depend on the full package paths rather than the phony targets to avoid