Fix delegate property name clash in JS BE

See KT-19542

js/js.translator/testData/box/delegateProperty/clashingNameInSubclass.kt

@@ -0,0 +1,44 @@
+// EXPECTED_REACHABLE_NODES: 1043
+fun box(): String {
+    val b = B()
+
+    var r = b.getFooA()
+    if (r != "A.foo") return "fail1: $r"
+
+    r = b.getFooB()
+    if (r != "B.foo") return "fail2: $r"
+
+    r = b.getBarA()
+    if (r != "A.bar") return "fail3: $r"
+
+    r = b.getBarB()
+    if (r != "B.bar") return "fail4: $r"
+
+    return "OK"
+}
+
+open class A {
+    open val foo by lazy {
+        "A.foo"
+    }
+
+    private val bar by lazy {
+        "A.bar"
+    }
+
+    fun getBarA() = bar
+}
+
+class B : A() {
+    override val foo by lazy {
+        "B.foo"
+    }
+
+    private val bar by lazy {
+        "B.bar"
+    }
+
+    fun getFooB() = foo
+    fun getFooA() = super.foo
+    fun getBarB() = bar
+}