Exposes folly config back to fabric components (#116)

Author: pmick

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

@@ -16,6 +16,10 @@ else
   source[:tag] = "v#{version}"
 end
 
+folly_config = get_folly_config()
+folly_compiler_flags = folly_config[:compiler_flags]
+folly_version = folly_config[:version]
+folly_dep_name = folly_config[:dep_name]
 react_native_path = ".."
 
 header_search_path = [