Added LLVM copyright notice.

llvm-svn: 9324
diff --git a/llvm/utils/TableGen/FileLexer.l b/llvm/utils/TableGen/FileLexer.l
index 64ed4c6..0858a8c 100644
--- a/llvm/utils/TableGen/FileLexer.l
+++ b/llvm/utils/TableGen/FileLexer.l
@@ -1,4 +1,11 @@
 /*===-- FileLexer.l - Scanner for TableGen Files ----------------*- C++ -*-===//
+// 
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by the LLVM research group and is distributed under
+// the University of Illinois Open Source License. See LICENSE.TXT for details.
+// 
+//===----------------------------------------------------------------------===//
 //
 // This file defines a simple flex scanner for TableGen files.  This is pretty
 // straight-forward, except for the magic to handle file inclusion.