repo-review: Add a 'restore' command line option

This CL enables repo_review.py to restore CL(s).

Test: repo-review.py -g [url] [query] --restore

Signed-off-by: Taesu Lee <taesu82.lee@samsung.com>
Change-Id: Ia1e84b35dbae453feba338fea1d1f101620cfa06
2 files changed