fix(iOS): enable DEFINES_MODULE in React-jsc (#51160)

Summary: Enables `DEFINES_MODULE` in `React-jsc.podspec` After upgrading app to RN `0.79`, when installing pods with JSC enabled there is an error being thrown that `The following Swift pods cannot yet be integrated as static libraries` `The Swift pod 'RNFlashList' depends upon 'React-jsc', which does not define modules. ...` when installing packages that use Swift ## Changelog: [IOS] [CHANGED] - enable `DEFINES_MODULE` in `React-jsc.podspec` Pull Request resolved: #51160 Test Plan: RNTester runs and builds correctly Reviewed By: huntie Differential Revision: D74325357 Pulled By: cipolleschi fbshipit-source-id: b994b7e678633440d5e362ae6965b2d5188d34f1

Author: krozniata

packages/react-native/ReactCommon/jsc/React-jsc.podspec

@@ -32,6 +32,6 @@ Pod::Spec.new do |s|
  s.dependency "React-jsi", version
 
  s.subspec "Fabric" do |ss|
- ss.pod_target_xcconfig = { "OTHER_CFLAGS" => "$(inherited)" }
+ ss.pod_target_xcconfig = { "OTHER_CFLAGS" => "$(inherited)", "DEFINES_MODULE" => "YES" }
  end
 end