message: Fix tests on linux build machine
  Same as
diff: #!/bin/bash
  #
  -# COPIED FROM https://github.com/Microsoft/vscode/blob/e29c517386fe6f3a40e2f0ff00effae4919406aa/build/tfs/linux/x64/xvfb.init
  +# COPIED FROM https://github.com/microsoft/vscode/blob/01e9903967417ba243cec705445eef9ecbfebfea/build/azure-pipelines/linux/xvfb.init
  #
  #
  # /etc/rc.d/init.d/xvfbd
  [ "${NETWORKING}" = "no" ] && exit 0
  PROG="/usr/bin/Xvfb"
  -PROG_OPTIONS=":10 -ac"
  +PROG_OPTIONS=":10 -ac -screen 0 1024x768x24"
  PROG_OUTPUT="/tmp/Xvfb.out"
  case "$1" in
  