Add a license to build-powerpc64le-toolchain.sh

Author: cuviper

src/ci/docker/dist-powerpc64-linux/build-powerpc64le-toolchain.sh

@@ -1,4 +1,13 @@
 #!/bin/bash
+# Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+# file at the top-level directory of this distribution and at
+# http://rust-lang.org/COPYRIGHT.
+#
+# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+# option. This file may not be copied, modified, or distributed
+# except according to those terms.
 
 set -ex