sysdig: remove broken patchelf call

[Mic92]

Motivation for this change

patchelf broke sysdig/csysdig binaries. I don't why this was added in the first place. 17.09 might be also affected by this breakage.

UPDATE 17.09 is also affected.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • Linux
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

[Mic92]

Ok. I think the problem was here, that new libraries where added. I suspect that in earlier versions the builds system was broken and was was by using patchelf.