contrib: Add gen_uprev_msg.py

Add gen_uprev_msg.py to parse ChangeLog from CPCon, and generate commit
message of uprev CL (such as CL:*2351594).

BUG=none
TEST=none

Change-Id: Ic3302af90526aaa780aacc98be0e3295f1a7810c
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2124038
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: Yu-Ping Wu <yupingso@chromium.org>
1 file changed