Update the license header in this man-page file.

It contains an `$Id$` expansion and so can only be updated from a true
Subversion client.

See the details of this update in r351636.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk/tools/scan-build@351640 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/man/scan-build.1 b/man/scan-build.1
index cf7e7b1..4f3cd8d 100644
--- a/man/scan-build.1
+++ b/man/scan-build.1
@@ -1,5 +1,6 @@
-.\" This file is distributed under the University of Illinois Open Source
-.\" License. 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
 .\" $Id$
 .Dd May 25, 2012
 .Dt SCAN-BUILD 1