Fixes to tests: forgotten package names and tests

backend.native/tests/codegen/objectExpression/expr1.kt

@@ -0,0 +1,17 @@
+package codegen.objectExpression.expr1
+
+import kotlin.test.*
+
+@Test fun runTest() {
+    val a = "a"
+
+    val x = object {
+        override fun toString(): String {
+            return foo(a) + foo("b")
+        }
+
+        fun foo(s: String) = s + s
+    }
+
+    println(x.toString())
+}