edk2: Replace BSD License with BSD+Patent License

https://bugzilla.tianocore.org/show_bug.cgi?id=1373

Replace BSD 2-Clause License with BSD+Patent License.  This change is
based on the following emails:

  https://lists.01.org/pipermail/edk2-devel/2019-February/036260.html
  https://lists.01.org/pipermail/edk2-devel/2018-October/030385.html

RFCs with detailed process for the license change:

  V3: https://lists.01.org/pipermail/edk2-devel/2019-March/038116.html
  V2: https://lists.01.org/pipermail/edk2-devel/2019-March/037669.html
  V1: https://lists.01.org/pipermail/edk2-devel/2019-March/037500.html

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

edksetup.bat

@@ -3,13 +3,7 @@
 @REM
 @REM Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
 @REM (C) Copyright 2016 Hewlett Packard Enterprise Development LP<BR>
-@REM This program and the accompanying materials
-@REM are licensed and made available under the terms and conditions of the BSD License
-@REM which accompanies this distribution.  The full text of the license may be found at
-@REM http://opensource.org/licenses/bsd-license.php
-@REM
-@REM THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-@REM WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+@REM SPDX-License-Identifier: BSD-2-Clause-Patent
 @REM
 
 @REM set CYGWIN_HOME=C:\cygwin

edksetup.sh

@@ -1,13 +1,7 @@
 #
 # Copyright (c) 2006 - 2016, Intel Corporation. All rights reserved.<BR>
 # Copyright (c) 2016, Linaro Ltd. All rights reserved.<BR>
-# This program and the accompanying materials
-# are licensed and made available under the terms and conditions of the BSD License
-# which accompanies this distribution.  The full text of the license may be found at
-# http://opensource.org/licenses/bsd-license.php
-# 
-# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
-# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
+# SPDX-License-Identifier: BSD-2-Clause-Patent
 #
 # In *inux environment, the build tools's source is required and need to be compiled
 # firstly, please reference https://github.com/tianocore/tianocore.github.io/wiki/SourceForge-to-Github-Quick-Start