Convert to setuptools pacakge.

The normal python package structure and setuptools package are required
for py.typed to be seen by importers, which is needed for callers to
type check use of gdbrunner.

Bug: None
Test: ndk-gdb --help && gdbclient --help
Change-Id: I9a6d65595f9572275e31f08b3678c300a78275d5

python-packages/gdbrunner/setup.py

@@ -0,0 +1,30 @@
+#
+# Copyright (C) 2023 The Android Open Source Project
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+from setuptools import setup
+
+
+setup(
+    name='gdbrunner',
+    version='0.0.1',
+    description='Common helpers of ndk-gdb and gdbclient.',
+    license='Apache 2.0',
+    packages=['gdbrunner'],
+    classifiers=[
+        'Development Status :: 2 - Pre-Alpha',
+        'Intended Audience :: Developers',
+        'License :: OSI Approved :: Apache Software License',
+    ]
+)