Just use normal binary for netem (#2397)

Should save a _lot_ of build time; i.e. we don't need a static one just
for our own internal testing.

Author: noonio

nix/hydra/docker.nix

@@ -34,7 +34,7 @@
             ];
           };
           config = {
-            Entrypoint = [ "${self'.packages.hydra-node-static}/bin/hydra-node" ];
+            Entrypoint = [ "${self'.packages.hydra-node}/bin/hydra-node" ];
           };
         };