jenkins-slave.sh: Fix tar command to use the correct flag for xz.
@@ -38,7 +38,7 @@ NODE_NAME=$(cat /home/ci/node_name)
if [[ ! -d /home/ci/node && $(uname) == "Linux" ]]; then
mkdir -p /home/ci/node &&
cd /home/ci/node &&
- curl https://nodejs.org/dist/v8.9.4/node-v8.9.4-linux-x64.tar.xz | tar xz &&
+ curl https://nodejs.org/dist/v8.9.4/node-v8.9.4-linux-x64.tar.xz | tar xJ &&
PATH=/home/ci/node/node-v8.9.4-linux-x64/bin:$PATH npm install -g typescript fried-twinkie
fi
