Merge boxWithStdlib testData into box, delete BoxWithStdlib test

compiler/testData/codegen/box/reflection/properties/memberAndMemberExtensionWithSameName.kt

@@ -0,0 +1,25 @@
+// WITH_REFLECT
+
+import kotlin.reflect.*
+
+class A {
+    val foo: String = "member"
+    val Unit.foo: String get() = "extension"
+}
+
+fun box(): String {
+    run {
+        val foo: KProperty1<A, *> = A::class.java.kotlin.memberProperties.single()
+        assert(foo.name == "foo") { "Fail name: $foo (${foo.name})" }
+        assert(foo.get(A()) == "member") { "Fail value: ${foo.get(A())}" }
+    }
+
+    run {
+        val foo: KProperty2<A, *, *> = A::class.java.kotlin.memberExtensionProperties.single()
+        assert(foo.name == "foo") { "Fail name: $foo (${foo.name})" }
+        foo as KProperty2<A, Unit, *>
+        assert(foo.get(A(), Unit) == "extension") { "Fail value: ${foo.get(A(), Unit)}" }
+    }
+
+    return "OK"
+}