Test a few extra variants

This might be overkill, since these modifiers aren't expected here.

Author: Blaisorblade

tests/neg/i4058.scala

@@ -1,3 +1,9 @@
 class A(sealed val a: Int) // error
 class B(lazy val a: Int) // error
 class C(abstract val a: Int) // error
+class D {
+  def f(sealed a: Int) = 0 // error
+  def g(lazy a: Int) = 0 // error
+  def g(override a: Int) = 0 // error
+  def g(abstract a: Int) = 0 // error
+}