[CHANGE ME] Re-generated cloudbuild to pick up changes in the API or client library generator.

[yoshi-automation]

This PR was generated using Autosynth. 🌈

Log from Synthtool

synthtool > Executing /tmpfs/src/git/autosynth/working_repo/cloudbuild/synth.py.
synthtool > Ensuring dependencies.
synthtool > Pulling artman image.
latest: Pulling from googleapis/artman
Digest: sha256:545c758c76c3f779037aa259023ec3d1ef2d57d2c8cd00a222cb187d63ceac5e
Status: Image is up to date for googleapis/artman:latest
synthtool > Cloning googleapis.
synthtool > Running generator for google/devtools/cloudbuild/artman_cloudbuild.yaml.
synthtool > Generated code into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/cloudbuild-v1.
synthtool > Copy: /home/kbuilder/.cache/synthtool/googleapis/google/devtools/cloudbuild/v1/cloudbuild.proto to /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/cloudbuild-v1/google/cloud/cloudbuild_v1/proto/cloudbuild.proto
synthtool > Placed proto files into /home/kbuilder/.cache/synthtool/googleapis/artman-genfiles/python/cloudbuild-v1/google/cloud/cloudbuild_v1/proto.
synthtool > Replaced 'from google.devtools.cloudbuild_v1.proto import ' in google/cloud/devtools/cloudbuild_v1/proto/cloudbuild_pb2_grpc.py.
synthtool > Replaced 'google-cloud-build' in docs/index.rst.
synthtool > Replaced 'google-cloud-build' in synth.py.
synthtool > Replaced 'google-cloud-build' in setup.py.
synthtool > Replaced 'google-cloud-build' in CHANGELOG.md.
synthtool > Replaced 'google-cloud-build' in docs/changelog.md.
synthtool > Replaced 'https://cloud\\.google\\.com/cloudbuild' in README.rst.
synthtool > Replaced 'https://googleapis\\.github\\.io/google-cloud-python/latest/core/auth\\.html' in README.rst.
.coveragerc
.flake8
MANIFEST.in
noxfile.py.j2
setup.cfg
Running session blacken
Creating virtual environment (virtualenv) using python3.6 in .nox/blacken
pip install black==19.3b0
black docs google tests noxfile.py setup.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/__init__.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/gapic/enums.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/docs/conf.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/gapic/cloud_build_client_config.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/gapic/transports/cloud_build_grpc_transport.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/types.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/noxfile.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/proto/cloudbuild_pb2_grpc.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/gapic/cloud_build_client.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/tests/unit/gapic/v1/test_cloud_build_client_v1.py
reformatted /tmpfs/src/git/autosynth/working_repo/cloudbuild/google/cloud/devtools/cloudbuild_v1/proto/cloudbuild_pb2.py
All done! ✨ 🍰 ✨
14 files reformatted, 5 files left unchanged.
Session blacken was successful.
synthtool > Cleaned up 2 temporary directories.
synthtool > Wrote metadata to synth.metadata.

[busunkim96]

Closing, will be fixed with #9638