KJS: transform labeled blocks to labeled do-while

It's a workaround for JDK-8177691.
Such code can appear during inline.

js/js.translator/testData/js-optimizer/labeled-block-to-do-while/simple.optimized.js

@@ -0,0 +1,62 @@
+var a = eval("true");
+
+function box() {
+    var functions = [box1,  box2, box3];
+
+    for (i in functions) {
+        var f = functions[i];
+        var result = f();
+
+        if (f.toString().indexOf("label: do {") < 0) {
+            // http://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8177691
+            if (result === "OK") return "Looks like JDK-8177691 fixed for " + f;
+            if (result !== void 0) return "Result of function changed: " + f;
+        }
+        else if (result !== "OK") {
+            return "fail on " + f
+        }
+    }
+
+    return "OK"
+}
+
+function box1() {
+    label: do {
+        try {
+            if (a) throw 1;
+        }
+        catch (e) {
+            break label;
+        }
+        throw 2;
+    } while (false);
+
+    return "OK";
+}
+
+function box2() {
+    label: do {
+        try {
+            if (a) throw 1;
+        }
+        finally {
+            break label;
+        }
+        throw 2;
+    } while (false);
+
+    return 'OK';
+}
+
+function box3() {
+    label: do {
+        try {
+            throw 1;
+        }
+        finally {
+            break label;
+        }
+    } while (false);
+
+    return 'OK';
+}