Adds support for a new target spec: 'mac_xcuitest_bundle'. This allows us to create UI testing bund…

test/mac/xcuitest/main.m

Index: test/mac/xcuitest/main.m
diff --git a/test/mac/xcuitest/main.m b/test/mac/xcuitest/main.m
new file mode 100644
index 0000000000000000000000000000000000000000..8f3483132b7b3d1799951297d00fbe5988a58fbe
--- /dev/null
+++ b/test/mac/xcuitest/main.m
@@ -0,0 +1,11 @@
+#import <UIKit/UIKit.h>
+
+#import "MyAppDelegate.h"
+
+int main(int argc, char * argv[]) {
+  @autoreleasepool {
+    UIApplicationMain(argc, argv, 
+                      nil, NSStringFromClass([MyAppDelegate class]));
+  }
+  return 1;
+}