Fix a bug on windows regarding blockSSE3 calculation

pkg/utils/crypto/sha1/sha1block_linux.go

@@ -1,5 +1,21 @@
 // +build amd64
 
+/*
+ * Minimalist Object Storage, (C) 2014 Minio, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 package sha1
 
 // #cgo CFLAGS: -DHAS_AVX2