Update remaining file headers of LLVM-project code to the new license.

For details, see r351675 which intalled the new license for the test
suite, and r351676 which handled headers in the ABI test suite.

This also involved cleaning up some weirdly mis-formatted headers in the
glib compat stubs.

git-svn-id: https://llvm.org/svn/llvm-project/test-suite/trunk@351677 91177308-0d34-0410-b5e6-96231b3b80d8

Author: chandlerc

External/CUDA/cmath.cu

@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     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
 //
 //===----------------------------------------------------------------------===//
 

External/CUDA/complex.cu

@@ -1,9 +1,8 @@
 //===----------------------------------------------------------------------===//
 //
-//                     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
 //
 //===----------------------------------------------------------------------===//