Add a toolchain for toolchain building

kotlin-native/tools/toolchain_builder/run_container.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+set -eou pipefail
+
+CONTAINER_NAME=kotlin-toolchain-builder
+IMAGE_NAME=kotlin-toolchain-builder
+TARGET=$1
+VERSION=$2
+
+if ! "docker ps -a | grep $CONTAINER_NAME";
+then
+  echo "Removing previous container..."
+  docker stop $CONTAINER_NAME
+  docker rm $CONTAINER_NAME
+  echo "Done."
+fi
+
+echo "Running build script in container..."
+docker run -it -v "$PWD"/artifacts:/artifacts --env TARGET="$TARGET" --env VERSION="$VERSION" --name=$CONTAINER_NAME $IMAGE_NAME
+echo "Done."