Update more file headers across all of the LLVM projects in the monorepo
to reflect the new license. These used slightly different spellings that
defeated my regular expressions.

We understand that people may be surprised that we're moving the header
entirely to discuss the new license. We checked this carefully with the
Foundation's lawyer and we believe this is the correct approach.

Essentially, all code in the project is now made available by the LLVM
project under our new license, so you will see that the license headers
include that license only. Some of our contributors have contributed
code under our old license, and accordingly, we have retained a copy of
our old license notice in the top-level files in each project and
repository.

llvm-svn: 351648
GitOrigin-RevId: 57b08b0944046a6a57ee9b7b479181f548a5b9b4
diff --git a/include/dwarf2.h b/include/dwarf2.h
index 9288226..9824fc0 100644
--- a/include/dwarf2.h
+++ b/include/dwarf2.h
@@ -1,9 +1,8 @@
 //===----------------------------- dwarf2.h -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 // DWARF constants. Derived from:
 //   - libcxxabi/src/Unwind/dwarf2.h
diff --git a/include/filenames.h b/include/filenames.h
index 726b6ad..005b302 100644
--- a/include/filenames.h
+++ b/include/filenames.h
@@ -1,9 +1,8 @@
 //===----------------------------- filenames.h ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/include/unwind-pe.h b/include/unwind-pe.h
index a460d55..8655a92 100644
--- a/include/unwind-pe.h
+++ b/include/unwind-pe.h
@@ -1,9 +1,8 @@
 //===----------------------------- unwind-pe.h ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 // Pointer-Encoding decoder. Derived from:
 //   - libcxxabi/src/Unwind/dwarf2.h
diff --git a/third_party/gofrontend/include/dwarf2.h b/third_party/gofrontend/include/dwarf2.h
index 9288226..9824fc0 100644
--- a/third_party/gofrontend/include/dwarf2.h
+++ b/third_party/gofrontend/include/dwarf2.h
@@ -1,9 +1,8 @@
 //===----------------------------- dwarf2.h -------------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 // DWARF constants. Derived from:
 //   - libcxxabi/src/Unwind/dwarf2.h
diff --git a/third_party/gofrontend/include/filenames.h b/third_party/gofrontend/include/filenames.h
index 726b6ad..005b302 100644
--- a/third_party/gofrontend/include/filenames.h
+++ b/third_party/gofrontend/include/filenames.h
@@ -1,9 +1,8 @@
 //===----------------------------- filenames.h ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
diff --git a/third_party/gofrontend/libgcc/unwind-pe.h b/third_party/gofrontend/libgcc/unwind-pe.h
index a460d55..8655a92 100644
--- a/third_party/gofrontend/libgcc/unwind-pe.h
+++ b/third_party/gofrontend/libgcc/unwind-pe.h
@@ -1,9 +1,8 @@
 //===----------------------------- unwind-pe.h ----------------------------===//
 //
-//                     The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 // Pointer-Encoding decoder. Derived from:
 //   - libcxxabi/src/Unwind/dwarf2.h