Add test for obsolete issue

#KT-1936 Obsolete

compiler/testData/codegen/box/traits/kt1936.kt

@@ -0,0 +1,23 @@
+var result = "Fail"
+
+trait MyTrait
+{
+    var property : String
+    fun foo()  {
+        result = property
+    }
+}
+
+open class B(param : String) : MyTrait
+{
+    override var property : String = param
+    override fun foo() {
+        super.foo()
+    }
+}
+
+fun box(): String {
+    val b = B("OK")
+    b.foo()
+    return result
+}