hadoop: fix build on darwin

pkgs/applications/networking/cluster/hadoop/containerExecutor.nix

···
     '';
 
     maintainers = with maintainers; [ illustris ];
-    platforms = attrNames platformAttrs;
+    platforms = filter (strings.hasSuffix "linux") (attrNames platformAttrs);
   };
 })

pkgs/applications/networking/cluster/hadoop/default.nix

···
       doCheck = true;
 
       # Build the container executor binary from source
-      containerExecutor = callPackage ./containerExecutor.nix {
+      # InstallPhase is not lazily evaluating containerExecutor for some reason
+      containerExecutor = if stdenv.isLinux then (callPackage ./containerExecutor.nix {
         inherit (finalAttrs) version;
         inherit platformAttrs;
-      };
+      }) else "";
 
       nativeBuildInputs = [ makeWrapper ]
                           ++ optionals stdenv.isLinux [ autoPatchelfHook ];