Fix/unify top comment in lib/Analysis/PolyhedralInfo.cpp

Change the top comment in PolyhedralInfo.cpp to use // instead of ///,
similarly to headers in other files.  This fixes the issue of copyright
line exceeding textwidth and triggering polly-check-format45 failure,
e.g. seen here:

http://lab.llvm.org:8011/builders/lldb-amd64-ninja-netbsd8/builds/18293/steps/run%20unit%20tests/logs/stdio

git-svn-id: https://llvm.org/svn/llvm-project/polly/trunk@351808 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Analysis/PolyhedralInfo.cpp b/lib/Analysis/PolyhedralInfo.cpp
index 54d3a04..d734d9e 100644
--- a/lib/Analysis/PolyhedralInfo.cpp
+++ b/lib/Analysis/PolyhedralInfo.cpp
@@ -1,20 +1,21 @@
 //===--------- PolyhedralInfo.cpp  - Create Scops from LLVM IR-------------===//
-///
-/// 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
-///
+//
+// 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
+//
 //===----------------------------------------------------------------------===//
-///
-/// An interface to the Polyhedral analysis engine(Polly) of LLVM.
-///
-/// This pass provides an interface to the polyhedral analysis performed by
-/// Polly.
-///
-/// This interface provides basic interface like isParallel, isVectorizable
-/// that can be used in LLVM transformation passes.
-///
-/// Work in progress, this file is subject to change.
+//
+// An interface to the Polyhedral analysis engine(Polly) of LLVM.
+//
+// This pass provides an interface to the polyhedral analysis performed by
+// Polly.
+//
+// This interface provides basic interface like isParallel, isVectorizable
+// that can be used in LLVM transformation passes.
+//
+// Work in progress, this file is subject to change.
+//
 //===----------------------------------------------------------------------===//
 
 #include "polly/PolyhedralInfo.h"