Multiplatform test annotations

Actual annotations are provided in kotlin-test-junit on JVM side
and in kotlin-test-js on JS side.

#KT-19696

libraries/kotlin.test/junit/build.gradle

@@ -1,12 +1,13 @@
 description = 'Kotlin Test JUnit'
 
-apply plugin: 'kotlin'
+apply plugin: 'kotlin-platform-jvm'
 
 configureJvm6Project(project)
 configurePublishing(project)
 
 
 dependencies {
+    expectedBy project(':kotlin-test:kotlin-test-annotations-common')
     compile project(':kotlin-test:kotlin-test-jvm')
     compile('junit:junit:4.12')
 }
@@ -26,7 +27,7 @@ dist {
 }
 
 compileKotlin {
-    kotlinOptions.freeCompilerArgs = ["-Xallow-kotlin-package", "-module-name", project.name]
+    kotlinOptions.freeCompilerArgs = ["-Xallow-kotlin-package", "-Xmulti-platform", "-module-name", project.name]
 }
 
 compileTestKotlin {

libraries/kotlin.test/junit/src/main/kotlin/Annotations.kt

@@ -0,0 +1,25 @@
+/*
+ * Copyright 2010-2017 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+@file:Suppress("INVISIBLE_MEMBER", "INVISIBLE_REFERENCE")
+@file:JvmPackageName("kotlin.test.annotations")
+package kotlin.test
+
+public actual typealias Test = org.junit.Test
+public actual typealias Ignore = org.junit.Ignore
+public actual typealias BeforeTest = org.junit.Before
+public actual typealias AfterTest = org.junit.After