[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/enum/loop.kt

@@ -0,0 +1,29 @@
+/*
+ * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+// JVM_ABI_K1_K2_DIFF: KT-63864
+// WITH_STDLIB
+
+import kotlin.test.*
+
+val sb = StringBuilder()
+
+
+enum class Zzz {
+    Z {
+        init {
+            sb.appendLine(Z.name)
+        }
+    }
+}
+
+fun box(): String {
+    sb.appendLine(Zzz.Z)
+    assertEquals("""
+        Z
+        Z
+
+    """.trimIndent(), sb.toString())
+    return "OK"
+}