Kapt: Simplify wrapper tests

(cherry picked from commit 1677984)

plugins/annotation-processing/testData/wrappers/kotlinWrappers/enum.kt

@@ -0,0 +1,11 @@
+// FQNAME: EnumClass
+
+enum class EnumClass {
+    RED, GREEN, BLUE;
+    
+    fun someFun() {
+        System.out.println("Hello, world!")
+    }
+    
+    fun stringRepresentation() = this.toString()
+}