Added %NeverOptimize runtime call that can disable optimizations for a method for tests.

test/mjsunit/regress/regress-1713b.js

Index: test/mjsunit/regress/regress-1713b.js
diff --git a/test/mjsunit/regress/regress-1713.js b/test/mjsunit/regress/regress-1713b.js
similarity index 99%
copy from test/mjsunit/regress/regress-1713.js
copy to test/mjsunit/regress/regress-1713b.js
index 0af1144a15d53bd6387cba85c1d7a3b6e97831f5..2e35fa42396a27c0dd11bcaa63b1ddc431a3ef0e 100644
--- a/test/mjsunit/regress/regress-1713.js
+++ b/test/mjsunit/regress/regress-1713b.js
@@ -83,7 +83,7 @@ function Incremental(O, x) {
 
   L.execute(O);
 
-  try {} catch (e) {}
+  %NeverOptimize();
 
   L = null;
   print(">>> 2 <<<");