edk2toolext.capsule: add __init__.py (#628)

__init__.py is missing from edk2toolext/capsule, which causes the module
to not be found on local edit installs of the project
(i.e. `pip install -e .`). This commit adds in the expected file.

edk2toolext/capsule/__init__.py

@@ -0,0 +1,9 @@
+##
+# Copyright (c) Microsoft Corporation
+#
+# SPDX-License-Identifier: BSD-2-Clause-Patent
+##
+"""This file exists to satisfy pythons packaging requirements.
+
+Read more: https://docs.python.org/3/reference/import.html#regular-packages
+"""

edk2toolext/capsule/capsule_tool.py

@@ -16,6 +16,7 @@
 import sys
 
 import yaml
+
 from edk2toolext.capsule import capsule_helper, signing_helper
 
 TOOL_DESCRIPTION = """

edk2toolext/capsule/signing_helper.py

@@ -18,9 +18,10 @@
 
 import importlib
 
-from edk2toolext.capsule import signtool_signer
 from edk2toollib.utility_functions import import_module_by_file_name
 
+from edk2toolext.capsule import signtool_signer
+
 # Valid types.
 PYOPENSSL_SIGNER = 'pyopenssl'
 SIGNTOOL_SIGNER = 'signtool'