Added regression test for escape analysis.

test/mjsunit/regress/regress-323845.js

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-function f() {
-  return (42 + (0 == 1 ? 1 : 2));
+// Regression test that breaks escape analysis because objects escape over
+// the arguments object.
+
+// Flags: --allow-natives-syntax
+
+function h() {
+  g.arguments;
 }
 
-
 function g(x) {
-  return (x + (0 == 1 ? 1 : 2));
+  h();
 }
 
-
-function h(x) {
-  return ((x + 1) + (0 == 1 ? 1 : 2));
+function f() {
+  g({});
 }
 
-assertEquals(44, f());
-assertEquals(45, g(43));
-assertEquals(47, h(44));
+f(); f(); f();
+%OptimizeFunctionOnNextCall(f);
+f();