scripts: Add SPDX headers
Add SPDX headers indicating the Apache-2.0 license to the scripts in the
scripts directory. This can be assumed due to the presence of the
Apache-2.0 LICENSE file at the top of the project.
Fixes #930
Signed-off-by: David Brown <david.brown@linaro.org>
diff --git a/scripts/imgtool/keys/general.py b/scripts/imgtool/keys/general.py
index f6b8a09..e8755f6 100644
--- a/scripts/imgtool/keys/general.py
+++ b/scripts/imgtool/keys/general.py
@@ -1,5 +1,7 @@
"""General key class."""
+# SPDX-License-Identifier: Apache-2.0
+
import sys
AUTOGEN_MESSAGE = "/* Autogenerated by imgtool.py, do not edit. */"