Enable using tokens in pathauto during user registration

Currently, using profile fields with pathauto doesn't work. For example, here is my user pattern:
people/[content-profile-profile-profile_firstname-raw]-[content-profile-profile-profile_lastname-raw]

When registering, no user alias is created because pathauto is invoked by hook_user, which fires before the content_profile_registration_user_register_submit callback. At first I thought this could be handled by adjusting module weights, but realized this doesn't help because hook_user (and thus pathauto) will always run before the form's other #submit callbacks.

Here is a patch that invokes hook_user_update after the profile node is saved. This allows pathauto (and any other interested module) to react to the new profile node.