[es8] More spec compliant syntactic tail calls implementation.

test/mjsunit/es8/syntactic-tail-call-simple.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 --harmony-explicit-tailcalls --stack-size=100
 
 //
 // Tail call normal functions.
 //
 (function() {
@@ skipping 101 matching lines @@
   var g_bound = g0.bind({});
   function f(n) {
     return continue f_bound(n);
   }
   assertEquals("foo", f(1e5));
   assertEquals("bar", f(1e5 + 1));
   %OptimizeFunctionOnNextCall(f);
   assertEquals("foo", f(1e5));
   assertEquals("bar", f(1e5 + 1));
 })();