Add PodTarget#resources_bundle_target_label(bundle_name)
Duplicate Bundle Targets for each Pod Target

This is to ensure that the bundles will be placed in the right namespaced build path, so that they are found where expected by Xcode's Copy Resources build phases.
[Spec][Integration] Add spec 'install_framework_resources' for Pods with resource bundles

Integrated with `use_frameworks!`.