Minor. Add more tests

compiler/testData/codegen/box/inlineClasses/kt47762Generic.kt

@@ -0,0 +1,16 @@
+// WITH_STDLIB
+// WORKS_WHEN_VALUE_CLASS
+// LANGUAGE: +ValueClasses, +GenericInlineClassParameter
+
+OPTIONAL_JVM_INLINE_ANNOTATION
+value class A<T: Int>(val a: T = 1 as T) {
+    companion object {
+        val a: Int = 2
+    }
+}
+
+fun box(): String {
+    if (A.a != 2) return "FAIL1"
+    val instance = A<Int>()
+    return if (instance.a != 1) "FAIL2" else "OK"
+}