LICENSE: add Facebook copyright
diff --git a/LICENSE b/LICENSE
index 16bf484..7944336 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,5 +1,6 @@
-Copyright (C) 2010-2012 Marat Dukhan
+Copyright (c) 2017 Facebook Inc.
 Copyright (C) 2012-2017 Georgia Institute of Technology
+Copyright (C) 2010-2012 Marat Dukhan
 
 All rights reserved.