third_party: add code.google.com/p/google-api-go-client/storage/v1, update googleapi

Change-Id: Ic5bd4cd44eecda87824c710f0b98675870894940
google cloudstorage: stat bucket at start. WIP.

Change-Id: Ia5c0981a1f31e347218d334a0748af19867b1adf