[Wasm] Add compiler support for the kotlin.test library

libraries/stdlib/wasm/stubs/jsStubs.kt

@@ -0,0 +1,12 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * 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.js
+
+@ExperimentalStdlibApi
+@Retention(AnnotationRetention.BINARY)
+@Target(AnnotationTarget.PROPERTY)
+@SinceKotlin("1.6")
+public actual annotation class JsEagerInitialization