message: Fix build per microsoft/vscode#75873
diff: @@ -25,10 +25,10 @@ addons:
  - libsecret-1-dev
  before_install:
  -- if [ $TRAVIS_OS_NAME == "linux" ]; then
  - export CXX="g++-4.9" CC="gcc-4.9" DISPLAY=:99.0;
  - sh -e /etc/init.d/xvfb start;
  - sleep 3;
  +- |
  + if [ $TRAVIS_OS_NAME == "linux" ]; then
  + export DISPLAY=':99.0'
  + /usr/bin/Xvfb :99 -screen 0 1024x768x24 > /dev/null 2>&1 &
  fi
  script:
  