Gradle: run k2js out-of-process if Gradle >= 3.2 is used

libraries/tools/kotlin-gradle-plugin-integration-tests/src/test/kotlin/org/jetbrains/kotlin/gradle/Kotlin2JsGradlePluginIT.kt

@@ -1,5 +1,7 @@
 package org.jetbrains.kotlin.gradle
 
+import org.jetbrains.kotlin.gradle.util.getFileByName
+import org.jetbrains.kotlin.gradle.util.modify
 import org.junit.Test
 
 class Kotlin2JsGradlePluginIT : BaseGradleIT() {
@@ -71,5 +73,20 @@ class Kotlin2JsGradlePluginIT : BaseGradleIT() {
             assertContains("compileKotlin2Js.kotlinOptions.outputFile should be specified.")
         }
     }
+
+    @Test
+    fun testKotlinJsBuiltins() {
+        val project = Project("kotlinBuiltins", "3.2")
+
+        project.setupWorkingDir()
+        val buildGradle = project.projectDir.getFileByName("build.gradle")
+        buildGradle.modify {
+            it.replace("apply plugin: \"kotlin\"", "apply plugin: \"kotlin2js\"") +
+                    "\ncompileKotlin2Js.kotlinOptions.outputFile = \"out/out.js\""
+        }
+        project.build("build") {
+            assertSuccessful()
+        }
+    }
 }