Fix Issues in 0.24.0 with Resource Bundles and Archive Action

Resource bundles have two issues in CocoaPods 0.24.0:

1. The rsync task copies symlinks into the App Bundle, producing an invalid app. This change add `--copy-links` to the rsync invocation to ensure the target files are copied rather than the symlink.
1. The Copy Resources script uses `TARGET_BUILD_DIR` which points to the App Archiving folder during an Archive action. Switching to `BUILT_PRODUCTS_DIR` instead ensures that the path is correct for all actions and configurations.

See #1309