Add an infra specific PRESUBMIT.py

This will run the standard LUCI config checks.
These include running the validation tool, catching issues with ACLs
and remote hosts.

They do no gauarantee complete correctness, but catch common programming
errors.

Change-Id: I83a8d325d1f491bd81d1d1dc095a43a52150ef90
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/59000
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Reviewed-by: James Price <jrprice@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: James Price <jrprice@google.com>

infra/config/PRESUBMIT.py

@@ -0,0 +1,25 @@
+# Copyright 2021 The Tint Authors
+#
+# 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.
+
+USE_PYTHON3 = True
+
+
+def CheckChangeOnUpload(input_api, output_api):
+    return input_api.canned_checks.CheckChangedLUCIConfigs(
+        input_api, output_api)
+
+
+def CheckChangeOnCommit(input_api, output_api):
+    return input_api.canned_checks.CheckChangedLUCIConfigs(
+        input_api, output_api)