fix arm64 tests broken by dockcross image update
diff --git a/kokoro/linux/aarch64/dockcross_helpers/run_dockcross_manylinux2014_aarch64.sh b/kokoro/linux/aarch64/dockcross_helpers/run_dockcross_manylinux2014_aarch64.sh
index 115478b..ba34fa7 100755
--- a/kokoro/linux/aarch64/dockcross_helpers/run_dockcross_manylinux2014_aarch64.sh
+++ b/kokoro/linux/aarch64/dockcross_helpers/run_dockcross_manylinux2014_aarch64.sh
@@ -12,11 +12,14 @@
DOCKER_TTY_ARGS=
fi
+# Pin the dockcross image since newer versions of the image break the build
+PINNED_DOCKCROSS_IMAGE_VERSION=dockcross/manylinux2014-aarch64:20210803-41e5c69
+
# running dockcross image without any arguments generates a wrapper
# scripts that can be used to run commands under the dockcross image
# easily.
# See https://github.com/dockcross/dockcross#usage for details
-docker run $DOCKER_TTY_ARGS --rm dockcross/manylinux2014-aarch64 >dockcross-manylinux2014-aarch64.sh
+docker run $DOCKER_TTY_ARGS --rm $PINNED_DOCKCROSS_IMAGE_VERSION >dockcross-manylinux2014-aarch64.sh
chmod +x dockcross-manylinux2014-aarch64.sh
# the wrapper script has CRLF line endings and bash doesn't like that
@@ -30,4 +33,4 @@
# * the processes in the container run under the same UID and GID as the host process so unlike
# vanilla "docker run" invocations, the workspace doesn't get polluted with files
# owned by root.
-./dockcross-manylinux2014-aarch64.sh "$@"
+./dockcross-manylinux2014-aarch64.sh --image $PINNED_DOCKCROSS_IMAGE_VERSION -- "$@"
