Added LLVM copyright header (for lack of a better term).

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@9304 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/CodeGen/MachineInstr.h

@@ -1,4 +1,11 @@
 //===-- llvm/CodeGen/MachineInstr.h - MachineInstr class --------*- 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 contains the declaration of the MachineInstr class, which is the
 // basic representation for all target dependent machine instructions used by