Use dummy file for FBReactNativeSpecs.podspec so that it doesn't incl…

…ude any files even there are old files.

Summary:
FBReactNativeSpecs.podspec is currently only acting as a config for codegen. It should not include any sources. This would fix unintended build error related to FBReactNativeSpecs-generated file.

Changelog: [internal]

Reviewed By: philIip

Differential Revision: D32267102

fbshipit-source-id: 27b510198666dc26a890cd7a6f873a04a9df66ca

React/FBReactNativeSpec/FBReactNativeSpec.podspec

@@ -32,7 +32,8 @@ Pod::Spec.new do |s|
   s.platforms              = { :ios => "11.0" }
   s.compiler_flags         = folly_compiler_flags + ' -Wno-nullability-completeness'
   s.source                 = source
-  s.source_files           = "**/FBReactNativeSpec*.{h,mm}"
+  # This podspec is used to trigger the codegen, and built files are generated in a different location.
+  # We don't want this pod to actually include any files.
   s.header_dir             = "FBReactNativeSpec"
 
   s.pod_target_xcconfig    = {

packages/rn-tester/Podfile.lock

@@ -881,7 +881,7 @@ SPEC CHECKSUMS:
   CocoaAsyncSocket: 065fd1e645c7abab64f7a6a2007a48038fdc6a99
   DoubleConversion: 831926d9b8bf8166fd87886c4abab286c2422662
   FBLazyVector: b81a2b70c72d8b0aefb652cea22c11e9ffd02949
-  FBReactNativeSpec: cd36c48651d54982428c1b0afd5557993b45e92c
+  FBReactNativeSpec: 745a95c0786e7b97aa2fb6f65c6ae35d2083fe57
   Flipper: 30e8eeeed6abdc98edaf32af0cda2f198be4b733
   Flipper-Boost-iOSX: fd1e2b8cbef7e662a122412d7ac5f5bea715403c
   Flipper-DoubleConversion: 57ffbe81ef95306cc9e69c4aa3aeeeeb58a6a28c
@@ -923,10 +923,10 @@ SPEC CHECKSUMS:
   React-RCTTest: 12bbd7fc2e72bd9920dc7286c5b8ef96639582b6
   React-RCTText: e9146b2c0550a83d1335bfe2553760070a2d75c7
   React-RCTVibration: 50be9c390f2da76045ef0dfdefa18b9cf9f35cfa
-  React-rncore: fb776508453c32c72c6325f421468eb8a1f3e2c4
+  React-rncore: e7f0e8fa2147c908ae2a96f048d5adb2b7dee1e8
   React-runtimeexecutor: 4b0c6eb341c7d3ceb5e2385cb0fdb9bf701024f3
   ReactCommon: 7a2714d1128f965392b6f99a8b390e3aa38c9569
-  ScreenshotManager: b6b23f4913712a245102024854656634fee33265
+  ScreenshotManager: 7720a2413a1ea43287bf355535fdc6ef34ccffba
   Yoga: c0d06f5380d34e939f55420669a60fe08b79bd75
   YogaKit: f782866e155069a2cca2517aafea43200b01fd5a