JS backend: added jsCode test cases

js/js.translator/testData/jsCode/cases/tryCatchFinally.kt

@@ -0,0 +1,27 @@
+package foo
+
+class Counter {
+    var count: Int = 0
+
+    public fun inc() {
+        count++
+    }
+}
+
+fun test(c: Counter, ex: Exception): Unit = js("""
+    try {
+        throw ex;
+    } catch (e) {
+        c.inc()
+    } finally {
+        c.inc()
+    }
+""")
+
+fun box(): String {
+    val c = Counter()
+    test(c, NullPointerException())
+    assertEquals(2, c.count)
+
+    return "OK"
+}