Fixed propagation for non-abstract methods inherited from traits.

compiler/testData/loadKotlin/fun/PropagateDeepSubclass.kt

@@ -0,0 +1,14 @@
+package test
+
+trait A {
+  fun foo() {}
+
+  fun bar() {}
+}
+
+open class B : A {
+}
+
+class C : B() {
+  override fun bar() {}
+}