GitLab

  - Allow running from outside the repo (--git-dir)
  - Date range for how many days to look back (--past-days)
  - Write metadata about start and end date parameters

Also moved the script under tools/android/modularization/loc

Bug: 1146478
Change-Id: Ic63ea085836d8b5750ada2299ba992221d97b9f9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2526863
Commit-Queue: Jinsuk Kim <jinsukkim@chromium.org>
Reviewed-by: Peter Wen <wnwen@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#826482}