win2k3: fix test-child-process-env

test/simple/test-child-process-env.js

@@ -34,7 +34,7 @@ env.__proto__ = {
 }
 
 if (isWindows) {
-  var child = spawn('cmd.exe', ['/c set'], {env: env});
+  var child = spawn('cmd.exe', ['/c', 'set'], {env: env});
 } else {
   var child = spawn('/usr/bin/env', [], {env: env});
 }