message: wget doesn't like the UE CDN certificate, try httpie.
diff: echo "Downloading Linux toolchain"
  -wget https://cdn.unrealengine.com/CrossToolchain_Linux/v19_clang-11.0.1-centos7.exe
  +http --download https://cdn.unrealengine.com/CrossToolchain_Linux/v19_clang-11.0.1-centos7.exe
  echo "Finished download"
  chmod a+x v19_clang-11.0.1-centos7.exe
  ./v19_clang-11.0.1-centos7.exe "//S"
  