Native: fix ^KT-49384

Don't report errors for projections in nested type arguments of
SAM conversion target types.

kotlin-native/backend.native/tests/codegen/funInterface/kt49384.kt

@@ -0,0 +1,36 @@
+/*
+ * Copyright 2010-2021 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
+ * that can be found in the LICENSE file.
+ */
+
+package codegen.funInterface.kt49384
+
+import kotlin.test.*
+
+interface A<T>
+
+// https://youtrack.jetbrains.com/issue/KT-49384
+class B<T> {
+    init {
+        mutableListOf<A<out T>>()
+                .sortWith { _, _ -> 1 }
+    }
+}
+
+@Test
+fun test1() {
+    val b = B<Any>()
+    assertEquals(b, b) // Just to ensure B is not deleted by DCE
+}
+
+fun interface Foo<T> {
+    fun same(obj: T): T
+}
+
+fun getSame(obj: A<out Any>, foo: Foo<A<out Any>>) = foo.same(obj)
+
+@Test
+fun test2() {
+    val obj = object : A<Any> {}
+    assertSame(obj, getSame(obj) { it })
+}