Add the license part to the new source files.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@73825 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/include/clang/Frontend/ASTUnit.h b/include/clang/Frontend/ASTUnit.h
index 1cbe2e2..68c06f5 100644
--- a/include/clang/Frontend/ASTUnit.h
+++ b/include/clang/Frontend/ASTUnit.h
@@ -1,3 +1,16 @@
+//===--- ASTUnit.h - ASTUnit utility ----------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// ASTUnit utility class.
+//
+//===----------------------------------------------------------------------===//
+
 #ifndef LLVM_CLANG_FRONTEND_ASTUNIT_H
 #define LLVM_CLANG_FRONTEND_ASTUNIT_H
 
diff --git a/lib/Frontend/ASTUnit.cpp b/lib/Frontend/ASTUnit.cpp
index 6ed8fbd..a7fbcda 100644
--- a/lib/Frontend/ASTUnit.cpp
+++ b/lib/Frontend/ASTUnit.cpp
@@ -1,3 +1,16 @@
+//===--- ASTUnit.cpp - ASTUnit utility ------------------------------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// ASTUnit Implementation.
+//
+//===----------------------------------------------------------------------===//
+
 #include "clang/Frontend/ASTUnit.h"
 #include "clang/Frontend/PCHReader.h"
 #include "clang/Frontend/TextDiagnosticBuffer.h"