Fix copyright year

cmake/external_mlir.cmake

 # ******************************************************************************
-# Copyright 2017-2019 Intel Corporation
+# Copyright 2019 Intel Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

cmake/mlir_fetch.cmake.in

 # ******************************************************************************
-# Copyright 2017-2019 Intel Corporation
+# Copyright 2019 Intel Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

src/contrib/mlir/CMakeLists.txt

 # ******************************************************************************
-# Copyright 2017-2019 Intel Corporation
+# Copyright 2019 Intel Corporation
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/dialect.cpp

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/ops.cpp

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/ops.hpp

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/ops.td

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/type.cpp

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/dialect/type.hpp

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.

src/contrib/mlir/op_lowerers.inc

 //*****************************************************************************
-// Copyright 2017-2019 Intel Corporation
+// Copyright 2019 Intel Corporation
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.