Fix a bug on windows regarding blockSSE3 calculation

pkg/utils/crypto/sha1/sha1block_generic.go

@@ -1,5 +1,14 @@
 // +build amd64
 
+// Copyright 2009 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file of
+// Golang project:
+//    https://github.com/golang/go/blob/master/LICENSE
+
+// Using this part of Minio codebase under the license
+// Apache License Version 2.0 with modifications
+
 package sha1
 
 const (