Adds generator support for Xcode 5 xctest targets.

test/mac/xctest/App/Tests/TestCase.m

+// Copyright (c) 2013 Google Inc. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+#import <XCTest/XCTest.h>
+#import "Shared+Category.h"
+#import "Shared+TestSupportCategory.h"
+
+@interface TestCase : XCTestCase
+@end
+
+@implementation TestCase
+
+- (void)tearDown {
+  [NSThread sleepForTimeInterval:1];
+  /*
+  NSUInteger total = 0;
+  for (NSUInteger i = 0; i < 10000; i++) {
+    total *= i;
+  }
+  NSLog(@"total: %u", total);
+  [NSThread sleepForTimeInterval:.1];
+  */
+}
+
+- (void)testFoo {
+  Shared *foo = [[Shared alloc] init];
+  XCTAssertNotNil([foo sharedCategoryMethod], @"expected category method");
+  XCTAssertNotNil([foo sharedCategoryMethodFromTestSupport],
+                  @"expected category method");
+}
+@end