[Tests] Migrate backend-independent tests from native to compiler/testData.

^KT-65979

compiler/testData/codegen/box/bridges/test7.kt

@@ -0,0 +1,34 @@
+/*
+ * Copyright 2010-2018 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.
+ */
+// WITH_STDLIB
+
+import kotlin.test.*
+
+// generic interface, non-generic impl, vtable call + interface call
+open class A {
+    open var size: Int = 56
+}
+
+interface C<T> {
+    var size: T
+}
+
+open class B : C<Int>, A()
+
+fun box(): String {
+    val b = B()
+    if (b.size != 56) return "fail 1"
+
+    b.size = 55
+    if (b.size != 55) return "fail 2"
+
+    val c: C<Int> = b
+    if (c.size != 55) return "fail 3"
+
+    c.size = 57
+    if (c.size != 57) return "fail 4"
+
+    return "OK"
+}