Remove BOM from C++ sources.

lib/Common/DataStructures/BigInt.cpp

@@ -1,4 +1,4 @@
-//-------------------------------------------------------------------------------------------------------
+//-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------

lib/Common/DataStructures/BigInt.h

@@ -1,4 +1,4 @@
-//-------------------------------------------------------------------------------------------------------
+//-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------

lib/Runtime/Library/MathLibrary.cpp

@@ -1,4 +1,4 @@
-//-------------------------------------------------------------------------------------------------------
+//-------------------------------------------------------------------------------------------------------
 // Copyright (C) Microsoft. All rights reserved.
 // Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.
 //-------------------------------------------------------------------------------------------------------