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

^KT-65979

compiler/testData/codegen/box/function/defaultsWithVarArg2.kt

@@ -0,0 +1,27 @@
+/*
+ * 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()
+
+fun foo(vararg arr: Int = intArrayOf(1, 2)) {
+    arr.forEach { sb.appendLine(it) }
+}
+
+fun box(): String {
+    foo()
+    foo(42)
+
+    assertEquals("""
+        1
+        2
+        42
+
+    """.trimIndent(), sb.toString())
+    return "OK"
+}