Fix #9229: add test

Author: liufengyun

tests/init/pos/i9229/A_1.scala

@@ -0,0 +1,7 @@
+package p
+
+class A {
+  class Link
+  object Link
+  def Link(tag: String): Link = ???
+}

tests/init/pos/i9229/B_2.scala

@@ -0,0 +1,6 @@
+import p.A
+
+object B {
+  val a = new A // No crash with check-init
+  object graph extends A // <<= crach with check-init
+}