haskell-rethinkdb: jailbreak to fix build with network 2.6.x

Also, disable the test suite, which won't succeed because it tries to
use network services like getProtocolByName.

pkgs/development/libraries/haskell/rethinkdb/default.nix

@@ -14,6 +14,8 @@ cabal.mkDerivation (self: {
     text time unorderedContainers utf8String vector
   ];
   testDepends = [ doctest ];
+  jailbreak = true;
+  doCheck = false;
   meta = {
     homepage = "http://github.com/atnnn/haskell-rethinkdb";
     description = "A driver for RethinkDB 1.15";