Add crc32c license headers Golang and Minio

pkg/utils/checksum/crc32c/crc32c_linux_test.go

@@ -2,6 +2,12 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// 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 crc32c
 
 import (