Adding missing utf-8 marker.

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>

modules-pr-backporter/library_multi_pull_requests.py

diff --git a/modules-pr-backporter/library_multi_pull_requests.py b/modules-pr-backporter/library_multi_pull_requests.py
index eef3574..2f4956f 100644
--- a/modules-pr-backporter/library_multi_pull_requests.py
+++ b/modules-pr-backporter/library_multi_pull_requests.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
 # Copyright 2020 SkyWater PDK Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

modules-pr-backporter/library_patch_submodules.py

diff --git a/modules-pr-backporter/library_patch_submodules.py b/modules-pr-backporter/library_patch_submodules.py
index 40c1006..b791eb8 100644
--- a/modules-pr-backporter/library_patch_submodules.py
+++ b/modules-pr-backporter/library_patch_submodules.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
 # Copyright 2020 SkyWater PDK Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");

modules-pr-backporter/library_submodules.py

diff --git a/modules-pr-backporter/library_submodules.py b/modules-pr-backporter/library_submodules.py
index 0cda394..d4ae6b6 100644
--- a/modules-pr-backporter/library_submodules.py
+++ b/modules-pr-backporter/library_submodules.py
@@ -1,4 +1,6 @@
 #!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+#
 # Copyright 2020 SkyWater PDK Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");