Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/propertyDelegation/kt27070Generic.kt

@@ -0,0 +1,25 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+import kotlin.properties.ReadOnlyProperty
+import kotlin.reflect.KProperty
+
+class Foo {
+    val a: Int = 42
+    val b by Delegate(0)
+}
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Delegate<T: Int>(val ignored: T): ReadOnlyProperty<Foo, Int> {
+    override fun getValue(thisRef: Foo, property: KProperty<*>): Int {
+        return thisRef.a
+    }
+}
+
+fun box(): String {
+    val x = Foo()
+    if (x.b != 42) throw AssertionError()
+
+    return "OK"
+}