clang-format-6.0 bump fixes

The bump to use clang-format-6.0 now reports these issues.

Change-Id: I174c882727eaa9adf472599443a2f8ef637e2f0a
Signed-off-by: Patrick Venture <venture@google.com>
diff --git a/src/event_serialize.cpp b/src/event_serialize.cpp
index c7e78d9..ddfc4b6 100644
--- a/src/event_serialize.cpp
+++ b/src/event_serialize.cpp
@@ -93,5 +93,5 @@
     }
 }
 
-} // namespace event
+} // namespace events
 } // namespace phosphor