Add BUCK configuration for RNTester-iOS (#39757)

Summary:
Pull Request resolved: #39757

Changelog: [Internal]

Reviewed By: fkgozali

Differential Revision: D49817124

fbshipit-source-id: cccbdb324ca5ecc1795189a7c07cfed6aa220020

Author: christophpurrer

Diff for: packages/react-native/Libraries/AppDelegate/RCTAppDelegate.h

@@ -5,6 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
+#import <React/RCTBridgeDelegate.h>
 #import <UIKit/UIKit.h>
 
 @class RCTBridge;

Diff for: packages/rn-tester/RNTester/AppDelegate.mm

@@ -21,6 +21,12 @@
 #import <RNTMyNativeViewComponentView.h>
 #endif
 
+#if BUNDLE_PATH
+NSString *kBundlePath = @"xplat/js/RKJSModules/EntryPoints/RNTesterTestBundle.js";
+#else
+NSString *kBundlePath = @"js/RNTesterApp.ios";
+#endif
+
 @implementation AppDelegate
 
 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
@@ -47,7 +53,7 @@ - (NSDictionary *)prepareInitialProps
 
 - (NSURL *)sourceURLForBridge:(RCTBridge *)bridge
 {
-  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"js/RNTesterApp.ios"];
+  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:kBundlePath];
 }
 
 - (BOOL)application:(UIApplication *)app
@@ -126,7 +132,7 @@ - (void)application:(__unused UIApplication *)application
 
 - (NSURL *)getBundleURL
 {
-  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:@"js/RNTesterApp.ios"];
+  return [[RCTBundleURLProvider sharedSettings] jsBundleURLForBundleRoot:kBundlePath];
 }
 #endif