[K/N][Tests] Move codegen test sources cycles..innerClass

^KT-61259

native/native.tests/testData/codegen/function/plus_eq.kt

@@ -0,0 +1,18 @@
+/*
+ * 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.
+ */
+
+package codegen.function.plus_eq
+
+import kotlin.test.*
+
+fun plus_eq(a: Int): Int {
+  var b = 11
+  b += a
+  return b
+}
+
+@Test fun runTest() {
+  if (plus_eq(3) != 14) throw Error()
+}