Reorganize stdlib-js sources specific to the current JS backend

Move kotlin-stdlib-js project and the sources specific to the current backend to 'stdlib/js-v1' directory,
but leave sources that can be shared with the new IR backend in the common 'stdlib/js' location
with exception for 'stdlib/js/src/generated', which is used exclusively for current backend.
This simplifies sourceset configuration when building stdlib with the new backend.

libraries/stdlib/js-v1/src/js/markerFunctions.js

@@ -0,0 +1,85 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the license/LICENSE.txt file.
+ */
+
+/**
+ * @param {string} id
+ * @param {Object} declaration
+ */
+Kotlin.defineModule = function (id, declaration) {
+};
+
+Kotlin.defineInlineFunction = function(tag, fun) {
+    return fun;
+};
+
+Kotlin.wrapFunction = function(fun) {
+    var f = function() {
+        f = fun();
+        return f.apply(this, arguments);
+    };
+    return function() {
+        return f.apply(this, arguments);
+    };
+};
+
+Kotlin.isTypeOf = function(type) {
+    return function (object) {
+        return typeof object === type;
+    }
+};
+
+Kotlin.isInstanceOf = function (klass) {
+    return function (object) {
+        return Kotlin.isType(object, klass);
+    }
+};
+
+Kotlin.orNull = function (fn) {
+    return function (object) {
+        return object == null || fn(object);
+    }
+};
+
+Kotlin.andPredicate = function (a, b) {
+    return function (object) {
+        return a(object) && b(object);
+    }
+};
+
+Kotlin.kotlinModuleMetadata = function (abiVersion, moduleName, data) {
+};
+
+Kotlin.suspendCall = function(value) {
+    return value;
+};
+
+Kotlin.coroutineResult = function(qualifier) {
+    throwMarkerError();
+};
+
+Kotlin.coroutineController = function(qualifier) {
+    throwMarkerError();
+};
+
+Kotlin.coroutineReceiver = function(qualifier) {
+    throwMarkerError();
+};
+
+Kotlin.setCoroutineResult = function(value, qualifier) {
+    throwMarkerError();
+};
+
+function throwMarkerError() {
+    throw new Error(
+        "This marker function should never been called. " +
+        "Looks like compiler did not eliminate it properly. " +
+        "Please, report an issue if you caught this exception.");
+}
+
+Kotlin.getFunctionById = function(id, defaultValue) {
+    return function() {
+        return defaultValue;
+    }
+};