Disabled patchElf

It breaks libstrongswan:

/nix/store/5a7gx1fmddqxxqc04mzwm73h6h4vxahk-strongswan-5.2.1/libexec/ipsec/starter:
symbol lookup error:
/nix/store/5a7gx1fmddqxxqc04mzwm73h6h4vxahk-strongswan-5.2.1/lib/ipsec/libstrongswan.so.0:
undefined symbol: XXX

https://github.com/NixOS/nixpkgs/issues/5045