kokoro: fix check-style

It wasn't running in the radial-builder image, so the using.sh
script failed.  And that failure was not detected.

Use the radial-builder image so we can get specified versions
of clang (for clang-format) and gofmt.

Bug: crbug.com/397705723
Change-Id: Ifc68bb0e19f9d89a00189ab5f0d17b4a3e10b691
Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/75028
Reviewed-by: Shahbaz Youssefi <syoussefi@google.com>
Tested-by: Shahbaz Youssefi <syoussefi@google.com>
Commit-Queue: Shahbaz Youssefi <syoussefi@google.com>
Kokoro-Result: kokoro <noreply+kokoro@google.com>

tests/kokoro/gcp_ubuntu/check_style-docker.sh

diff --git a/tests/kokoro/gcp_ubuntu/check_style-docker.sh b/tests/kokoro/gcp_ubuntu/check_style-docker.sh
new file mode 100755
index 0000000..d7e871d
--- /dev/null
+++ b/tests/kokoro/gcp_ubuntu/check_style-docker.sh
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+
+set -e # Fail on first failure
+
+. /bin/using.sh
+
+set -x # Display commands being run.
+
+using clang-13.0.1
+using go-1.23.4
+
+# Run presubmit tests
+cd "$SCRIPT_DIR/../../.."
+./tests/presubmit.sh

tests/kokoro/gcp_ubuntu/check_style.sh

diff --git a/tests/kokoro/gcp_ubuntu/check_style.sh b/tests/kokoro/gcp_ubuntu/check_style.sh
index e9e35a9..c16df08 100755
--- a/tests/kokoro/gcp_ubuntu/check_style.sh
+++ b/tests/kokoro/gcp_ubuntu/check_style.sh
@@ -1,16 +1,26 @@
 #!/bin/bash
 
-. /bin/using.sh
+# Copyright 2022 The SwiftShader Authors. All Rights Reserved.
+#
+# 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.
 
-set -x # Display commands being run.
+set -e # Fail on any error.
 
 SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd )"
+ROOT_DIR="$( cd "${SCRIPT_DIR}/../../.." >/dev/null 2>&1 && pwd )"
 
-using clang-13.0.1
-
-# Set up env vars
-export CLANG_FORMAT=`which clang-format`
-
-# Run presubmit tests
-cd git/SwiftShader
-./tests/presubmit.sh
+docker run --rm -i \
+  --volume "${ROOT_DIR}:${ROOT_DIR}" \
+  --workdir "${ROOT_DIR}" \
+  --entrypoint "${SCRIPT_DIR}/check_style-docker.sh" \
+  "gcr.io/shaderc-build/radial-build:latest"