misc: switch copyright to Valve
diff --git a/layers/mem_tracker.cpp b/layers/mem_tracker.cpp
index 860a77a..9cdb3f1 100644
--- a/layers/mem_tracker.cpp
+++ b/layers/mem_tracker.cpp
@@ -1,6 +1,6 @@
 /*
  *
- * Copyright (C) 2015 LunarG, Inc.
+ * Copyright (C) 2015 Valve Corporation
  * Copyright (C) 2015 Google, Inc.
  *
  * Permission is hereby granted, free of charge, to any person obtaining a