Fixing cpplint legal/copyright issues

Change-Id: I9547b53bccb0e67079c5e9c6b26889316739dc64
diff --git a/compiler/sea_ir/frontend.cc b/compiler/sea_ir/frontend.cc
index 9af7eff..7bfc9ba 100644
--- a/compiler/sea_ir/frontend.cc
+++ b/compiler/sea_ir/frontend.cc
@@ -1,3 +1,19 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 #ifdef ART_SEA_IR_MODE
 #include <llvm/Support/Threading.h>
 #include "base/logging.h"