Another test case for multipayload enums with different payload types

This test case would also crash before my recent IRGen multipayload enum
fix.

Author: aschwaighofer

test/Interpreter/enum_bridged.swift

@@ -0,0 +1,37 @@
+// RUN: %empty-directory(%t)
+// RUN: %target-build-swift %s -o %t/a.out
+// RUN: %target-run %t/a.out | %FileCheck %s
+// REQUIRES: executable_test
+
+// REQUIRES: objc_interop
+import Foundation
+class K {}
+enum MixedBridged {
+  case Native(K)
+  case Bridged([K])
+  case Empty
+}
+
+struct Container {
+  var storage : MixedBridged = .Empty
+
+  mutating func adoptStyle(_ s: [K]) {
+    storage = .Bridged(s)
+  }
+}
+
+func copyStorage(_ s: [K], _ x : Container) -> Container {
+  var c = x
+  c.adoptStyle(s)
+  return c
+}
+
+func testCase() {
+  let nsArray = NSArray(objects:K(), K())  as! [K]
+  let l = Container()
+  let c = copyStorage(nsArray, l)
+  print(c)
+}
+
+// CHECK: Container(storage: a.MixedBridged.Bridged([a.K, a.K]))
+testCase()