Merge branch 'jk/pack-bitmap-progress'

The progress output while repacking and transferring objects showed
an apparent large silence while writing the objects out of existing
packfiles, when the reachability bitmap was in use.

* jk/pack-bitmap-progress:
  pack-objects: show reused packfile objects in "Counting objects"
  pack-objects: show progress for reused packfiles

diff --cc builtin/pack-objects.c
Simple merge