test: fix parallel/test-repl-harmony with new v8

Assignment to a const var in strict mode is a lazy TypeError now.
Update the test accordingly.

PR-URL: #243
Reviewed-By: Fedor Indutny <fedor@indutny.com>
Reviewed-By: Trevor Norris <trev.norris@gmail.com>

test/parallel/test-repl-harmony.js

@@ -23,11 +23,11 @@ var common = require('../common');
 var assert = require('assert');
 
 var spawn = require('child_process').spawn;
-var args = ['--harmony', '--use-strict', '-i'];
+var args = ['--harmony', '--harmony_scoping', '--use-strict', '-i'];
 var child = spawn(process.execPath, args);
 
-var input = 'function x(){const y=1;y=2}\n';
-var expectOut = /^> SyntaxError: Assignment to constant variable.\n/;
+var input = '(function(){const y=1;y=2})()\n';
+var expectOut = /^> TypeError: Assignment to constant variable.\n/;
 
 child.stderr.setEncoding('utf8');
 child.stderr.on('data', function(c) {