Kapt3: Add simple AP test with Kotlin

plugins/kapt3/testData/kotlinRunner/Simple.kt

@@ -0,0 +1,19 @@
+package test
+
+internal class Simple {
+    @MyAnnotation
+    fun myMethod() {
+        // do nothing
+    }
+}
+
+internal annotation class MyAnnotation
+
+internal enum class EnumClass {
+    BLACK, WHITE
+}
+
+
+internal enum class EnumClass2 private constructor(private val blah: String) {
+    WHITE("A"), RED("B")
+}

plugins/kapt3/testData/kotlinRunner/Simple.txt

@@ -0,0 +1,4 @@
+MyMethodMyAnnotation.java:
+
+package generated;
+class MyMethodMyAnnotation {}