Prohibit from eliminating non-local temporary variables

js/js.translator/testData/js-optimizer/temporary-variable/skipsGlobalDeclarations.optimized.js

@@ -0,0 +1,14 @@
+var $tmp;
+
+function test(a, b, c) {
+    $tmp = a + b;
+    return $tmp + c;
+}
+
+function box() {
+    var result = test(2, 3, 4);
+    if (result != 9) return "fail1: " + result;
+    if ($tmp != 5) return "fail2: " + $tmp; 
+
+    return "OK"
+}