message: fix zstd OSS build
  Summary:
  * pull the same version used by getdeps
  * actually build zstd (we were not entering the directory)
diff: @@ -249,7 +249,9 @@ function setup_zstd() {
  echo -e "${COLOR_GREEN}[ INFO ] Cloning zstd repo ${COLOR_OFF}"
  git clone https://github.com/facebook/zstd.git "$ZSTD_DIR"
  fi
  -
  + cd "$ZSTD_DIR"
  + git fetch --tags
  + git checkout v1.4.5
  echo -e "${COLOR_GREEN}Building Zstd ${COLOR_OFF}"
  mkdir -p "$ZSTD_BUILD_DIR"
  cd "$ZSTD_BUILD_DIR" || exit
  