kcargo.sh: add copyright

Change-Id: I426814e7bb9404322f38970fd600d92771ba0d9a

kcargo.sh

diff --git a/kcargo.sh b/kcargo.sh
index 6ed12ac..8664a72 100755
--- a/kcargo.sh
+++ b/kcargo.sh
@@ -1,4 +1,18 @@
 #! /bin/bash
+#
+# Copyright 2020 Google LLC
+#
+# 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
+#
+#     https://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.
 
 # Script for running Shodan cargo outside the build; useful
 # for doing things like kcargo tree or kcargo clippy.