JS: support [suspend] fun main([args: Array<String>]) (KT-26628, KT-26572 fixed)

libraries/stdlib/coroutines/js/src/kotlin/coroutines/js/internal/EmptyContinuation.kt

@@ -0,0 +1,14 @@
+/*
+ * 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.
+ */
+
+package kotlin.coroutines.js.internal
+
+import kotlin.coroutines.Continuation
+import kotlin.coroutines.EmptyCoroutineContext
+
+@PublishedApi
+internal val EmptyContinuation = Continuation<Any?>(EmptyCoroutineContext) { result ->
+    result.getOrThrow()
+}