Add OSS headers to settings.py

Summary: See title.

Reviewed By: sdaulton

Differential Revision: D16646721

fbshipit-source-id: b8f1f1cf6d91820f1fe558f5693bb63970f2150f

Author: Balandat

botorch/settings.py

@@ -1,5 +1,11 @@
 #!/usr/bin/env python3
 
+# Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved
+
+r"""
+BoTorch settings.
+"""
+
 import typing  # noqa F401