Log the elapsed realtime in non-chained interface.

Test: statsd test
Change-Id: I61e457bd069147fd1b1fc964b27d42d4ec19230d
diff --git a/tools/stats_log_api_gen/main.cpp b/tools/stats_log_api_gen/main.cpp
index a78b1a2..f0628c0 100644
--- a/tools/stats_log_api_gen/main.cpp
+++ b/tools/stats_log_api_gen/main.cpp
@@ -214,6 +214,7 @@
         fprintf(out, "{\n");
         argIndex = 1;
         fprintf(out, "    android_log_event_list event(kStatsEventTag);\n");
+        fprintf(out, "    event << android::elapsedRealtimeNano();\n\n");
         fprintf(out, "    event << code;\n\n");
         for (vector<java_type_t>::const_iterator arg = signature->begin();
             arg != signature->end(); arg++) {