[turbofan] Clear pending exception from unsuccessful compilation.

test/mjsunit/regress/regress-458987.js

 // Copyright 2014 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.
 
-function args(arg) { return arguments; }
-var a = args(false);
+(function () {
+  "use asm";
 
-(function () {
-  "use strict";
-  a["const" + 0] = 0;
+  function g() {}
+
+  runNearStackLimit(g);
 })();
 
-(function () {
-  "use strict";
-  a[0] = 0;
-})();
+function runNearStackLimit(f) {
+  function g() { try { g(); } catch(e) { f(); } };
+  g();
+}