Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/fieldNameClashGeneric.kt

@@ -0,0 +1,14 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class Z<T: String>(val s: T) {
+    val Int.s: Int get() = 42
+}
+
+fun box(): String {
+    if (Z("a").toString() == "Z(s=a)")
+        return "OK"
+    return "Fail"
+}