[es8] Initial set of changes to support syntactic tail calls.

test/message/syntactic-tail-call-in-try.js

Index: test/message/syntactic-tail-call-in-try.js
diff --git a/test/mjsunit/regress/regress-crbug-595657.js b/test/message/syntactic-tail-call-in-try.js
similarity index 64%
copy from test/mjsunit/regress/regress-crbug-595657.js
copy to test/message/syntactic-tail-call-in-try.js
index 653259781be24ec1acf1d5e2aa4f4de2f361d3ec..97eb4f757ab27e898e888078a46b80a8df61097a 100644
--- a/test/mjsunit/regress/regress-crbug-595657.js
+++ b/test/message/syntactic-tail-call-in-try.js
@@ -2,14 +2,15 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-// Flags: --stack-size=100
+// Flags: --harmony-explicit-tailcalls
 
-function test() {
+function f() {
+  return 1;
+}
+
+function g() {
   try {
-    test();
+    return continue f();
   } catch(e) {
-    /(\2)(a)/.test("");
   }
 }
-
-test();