[IR] Add missing copyright header.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@298234 91177308-0d34-0410-b5e6-96231b3b80d8

lib/IR/Operator.cpp

@@ -1,3 +1,16 @@
+//===-- Operator.cpp - Implement the LLVM operators -----------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the non-inline methods for the LLVM Operator classes.
+//
+//===----------------------------------------------------------------------===//
+
 #include "llvm/IR/Operator.h"
 #include "llvm/IR/GetElementPtrTypeIterator.h"
 #include "llvm/IR/Instructions.h"