[bundle] Copy file data instead of symlinks.
[bundle] Copy file data instead of symlinks.

Windows doesn't like 'em, and we don't really need 'em. Keep it simple :)

R=tandrii@chromium.org, 9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org

Bug: 811974
Change-Id: I72fd296ab662f1acfd21a451a4525849d1e777b5
Reviewed-on: https://chromium-review.googlesource.com/959539
Reviewed-by: Vadim Shtayura <9f116ddb1b24f6fc1916a676eb17161b6c07dfc1@chromium.org>
Reviewed-by: Nodir Turakulov <ef4933a197ef7b4b3f55f1bec4942aead3637a2a@chromium.org>
Commit-Queue: Robbie Iannucci <40f3d43a28ebae3cb819288542e1c84d73d962d5@chromium.org>

luci/recipes-py,luci/recipes-py