git: upgraded package to upstream

Upgraded dev-vcs/git to version 2.29.2 for everyone.
This includes git init updates for handling master->main better.

BUG=chromium:1126855
TEST=CQ passes

Change-Id: Iafcde9458fc100a68fcbabad59c8f25d6595e73b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2569272
Tested-by: Mike Frysinger <vapier@chromium.org>
Reviewed-by: LaMont Jones <lamontjones@chromium.org>
Commit-Queue: LaMont Jones <lamontjones@chromium.org>
6 files changed