Adds Simulator Longjmp and enables many tests for arm64.

runtime/vm/exceptions_test.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-// TODO(zra): Remove when tests are ready to enable.
-#include "platform/globals.h"
-#if !defined(TARGET_ARCH_ARM64)
-
 #include "include/dart_api.h"
 #include "platform/assert.h"
 #include "vm/dart_api_impl.h"
 #include "vm/unit_test.h"
 
 namespace dart {
 
 
 #define FUNCTION_NAME(name) UnhandledExcp_##name
 #define REGISTER_FUNCTION(name, count)                                         \
@@ skipping 111 matching lines @@
       "  UnhandledExceptions.equals(2, Second.method1(1));\n"
       "  UnhandledExceptions.equals(3, Second.method3(1));\n"
       "}";
   Dart_Handle lib = TestCase::LoadTestScript(
       kScriptChars,
       reinterpret_cast<Dart_NativeEntryResolver>(native_lookup));
   EXPECT_VALID(Dart_Invoke(lib, NewString("testMain"), 0, NULL));
 }
 
 }  // namespace dart
-
-#endif  // !defined(TARGET_ARCH_ARM64)