init: even better logging around subsequent sys.powerctl messages

Bug: 150863651
Test: add delays during critical parts of shutdown and see the
      expected debug information
Change-Id: Ida586903fd3eefc32ca9ee34ea2db037896ed9f4
diff --git a/init/property_service.cpp b/init/property_service.cpp
index a5fea7c..1e4e127 100644
--- a/init/property_service.cpp
+++ b/init/property_service.cpp
@@ -489,6 +489,7 @@
         }
         LOG(INFO) << "Received sys.powerctl='" << value << "' from pid: " << cr.pid
                   << process_log_string;
+        DebugRebootLogging();
     }
 
     // If a process other than init is writing a non-empty value, it means that process is