Add license headers

Signed-off-by: Daniel Lim Wee Soong <weesoong.lim@gmail.com>

docs/conf.py

diff --git a/docs/conf.py b/docs/conf.py
index 1ab0142..ccbda5f 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -1,5 +1,14 @@
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 #
+# Copyright (C) 2020  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier:	ISC
+#
 # SymbiFlow V2X documentation build configuration file, created by
 # sphinx-quickstart on Mon Feb  5 11:04:37 2018.
 #

setup.py

diff --git a/setup.py b/setup.py
index 6304a63..cd18169 100644
--- a/setup.py
+++ b/setup.py
@@ -1,3 +1,14 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
+# Copyright (C) 2020  The SymbiFlow Authors.
+#
+# Use of this source code is governed by a ISC-style
+# license that can be found in the LICENSE file or at
+# https://opensource.org/licenses/ISC
+#
+# SPDX-License-Identifier:	ISC
+
 import setuptools
 
 with open("README.rst", "r") as fh: