Merge pull request #222998 from viraptor/livepeer-darwin

livepeer: mark not broken on darwin

pkgs/servers/livepeer/default.nix

···
-{ stdenv, lib, fetchFromGitHub, buildGoModule
+{ lib, fetchFromGitHub, buildGoModule
 , pkg-config, ffmpeg, gnutls
 }:
 
···
   buildInputs = [ ffmpeg gnutls ];
 
   meta = with lib; {
-    broken = stdenv.isDarwin;
     description = "Official Go implementation of the Livepeer protocol";
     homepage = "https://livepeer.org";
     license = licenses.mit;