haskell-process-conduit: temporarily disable tests

The tests have not been ported to use conduit-1.1 yet (there is a pull
request pending on GitHub).

pkgs/development/libraries/haskell/process-conduit/default.nix

@@ -11,6 +11,9 @@ cabal.mkDerivation (self: {
     text
   ];
   testDepends = [ conduit hspec ];
+  # This check is being disabled until process-conduit is updated to properly
+  # support conduit 1.1.x
+  doCheck = false;
   meta = {
     homepage = "http://github.com/tanakh/process-conduit";
     description = "Conduits for processes";