[bazel] Add a license check rule.

Signed-off-by: Chris Frantz <cfrantz@google.com>
diff --git a/rules/scripts/BUILD b/rules/scripts/BUILD
new file mode 100644
index 0000000..c7802ec
--- /dev/null
+++ b/rules/scripts/BUILD
@@ -0,0 +1,7 @@
+# Copyright lowRISC contributors.
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+package(default_visibility = ["//visibility:public"])
+
+exports_files(glob(["**"]))