[Native][tests] Move golden data outside of Gradle build file

kotlin-native/backend.native/tests/runtime/basic/entry3.kt

@@ -0,0 +1,22 @@
+/*
+ * 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.
+ */
+
+fun fail() {
+    println("Test failed, this is a wrong main() function.")
+}
+
+fun foo(args: Array<String>) {
+    println("Hello.")
+}
+
+fun bar() {
+    println("Hello, without args.")
+}
+
+
+fun main(args: Array<String>) {
+    fail()
+}
+