Opt into prebuilds of React Native dependencies

Author: kraenhansen

apps/test-app/ios/Podfile

@@ -1,3 +1,6 @@
+# Opt into prebuilds of RN dependencies
+ENV['RCT_USE_RN_DEP'] = ENV['RCT_USE_RN_DEP'] || '1'
+
 ws_dir = Pathname.new(__dir__)
 ws_dir = ws_dir.parent until
   File.exist?("#{ws_dir}/node_modules/react-native-test-app/test_app.rb") ||