Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reified/anonymousObject.kt

@@ -0,0 +1,21 @@
+// WITH_RUNTIME
+
+import kotlin.test.assertEquals
+
+abstract class A {
+    abstract fun f(): String
+}
+
+inline fun<reified T : Any> foo(): A {
+    return object : A() {
+        override fun f(): String {
+            return T::class.java.getName()
+        }
+    }
+}
+
+fun box(): String {
+    val y = foo<String>();
+    assertEquals("java.lang.String", y.f())
+    return "OK"
+}