[merge] BranchBuilder passes timestamps through to commit

[Bundle Buggy]

Bundle Buggy has detected this merge request.

For details, see: 
http://bundlebuggy.aaronbentley.com/project/bzr/request/%3Ce01316480903021748g489f7594r38d6b996431f654e%40mail.gmail.com%3E
Project: Bazaar