print the test passed message

this's for the TradeFed's result parser.

Change-Id: Ia758eb9be4bac13778ccb05db1e7afb4d7d797ed
diff --git a/sysfuzzer/framework/VtsFuzzerMain.cpp b/sysfuzzer/framework/VtsFuzzerMain.cpp
index ec9f8e7..3b07c07 100644
--- a/sysfuzzer/framework/VtsFuzzerMain.cpp
+++ b/sysfuzzer/framework/VtsFuzzerMain.cpp
@@ -38,6 +38,7 @@
 using namespace android;
 
 #define INTERFACE_SPEC_LIB_FILENAME "libvts_interfacespecification.so"
+#define PASSED_MARKER "[  PASSED  ]"
 
 // the default epoch count where an epoch is the time for a fuzz test run
 // (e.g., a function call).
@@ -149,5 +150,6 @@
                               target_class,
                               target_type,
                               target_version) << endl;
+  cout << endl << PASSED_MARKER << endl;
   return 0;
 }