chromite: Run yapf on a few scripts.

This is to minimize difference between this and the followup
cleanup CL.

BUG=chromium:861924
TEST=chromite unit tests pass.

Exempt-From-Owner-Approval: Already approved before rebase to tot.

Change-Id: I9f5f3f57d1c61f976ffd80e03ed4af168314038d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/chromite/+/1658518
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Commit-Queue: Manoj Gupta <manojgupta@chromium.org>
Tested-by: Manoj Gupta <manojgupta@chromium.org>
diff --git a/scripts/cros_sdk.py b/scripts/cros_sdk.py
index 3234547..ac1393f 100644
--- a/scripts/cros_sdk.py
+++ b/scripts/cros_sdk.py
@@ -2,6 +2,7 @@
 # Copyright (c) 2012 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+
 """Manage SDK chroots.
 
 This script is used for manipulating local chroot environments; creating,