When doing a dry run of packaging the toolchain we have always printed
stats on the size and number of files. It is odd and annoying that we
don't print those stats when doing the actual packaging, so this changes
that.

Change-Id: Ic60c3f4960dacaea39c048dc0c5f4c50b551f68a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2380231Reviewed-by: Mirko Bonadei <mbonadei@chromium.org>
Commit-Queue: Bruce Dawson <brucedawson@chromium.org>