[ic] Always use generic ICs for growing element stores on arguments

test/mjsunit/regress/regress-5772.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --allow-natives-syntax
+
+(function sloppyPackedArguments() {
+  function f(a) {
+    for (var i = 0; i < 2; i++) {
+      a[i] = 0;
+    }
+  }
+  var boom;
+  function g() {
+    var a = arguments;
+    f(a);
+    boom = a[5];
+    assertEquals(undefined, boom);
+  }
+
+  f([]);
+  g(1);
+})();
+
+(function strictPackedArguments() {
+  "use strict";
+  function f(a) {
+    for (var i = 0; i < 2; i++) {
+      a[i] = 0;
+    }
+  }
+  var boom;
+  function g() {
+    var a = arguments;
+    f(a);
+    boom = a[5];
+    assertEquals(undefined, boom);
+  }
+
+  f([]);
+  g(1);
+})();