fw-updater: Add target directory and Cargo.lock to .gitignore

BUG=None
TEST=None

Change-Id: I804bcf30f37ad30269848d2cf5003cdeac967a78
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dolos/+/5487918
Tested-by: Udaya Kiran Ammu <udaykiran@google.com>
Owners-Override: Hsin-Yi Wang <hsinyi@chromium.org>
Reviewed-by: Samuel Jacob <samjaco@google.com>
Reviewed-by: Udaya Kiran Ammu <udaykiran@google.com>
Commit-Queue: Udaya Kiran Ammu <udaykiran@google.com>
1 file changed