Fix #11100: add test

Author: liufengyun

tests/neg/i11100.scala

@@ -0,0 +1,14 @@
+import scala.annotation.static
+
+class C {
+  val a: Int = 3
+  class D
+  object D {
+    @static def foo: Int = a * a // error
+  }
+}
+
+@main
+def Test =
+  val c = new C
+  println(c.D.foo)