Fix for KT-9958: NoSuchMethodError when we call protected method from companion object

#KT-9958 Fixed

compiler/testData/codegen/boxMultiFile/kt9958Interface/b.kt

@@ -0,0 +1,9 @@
+package b
+
+var result = "fail"
+
+abstract class A {
+    protected fun foo() {
+        result = "OK"
+    }
+}