quick-provision: disable tar timestamp warning

Otherwise tar may produce thousands lines of warning if the DUT's clock
is out of sync.

BUG=b:170635511
TEST=None

Change-Id: Ib01eabf2efb7a8c6813341cdf1177b23d684c4a8
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/dev-util/+/2717273
Auto-Submit: Kuang-che Wu <kcwu@chromium.org>
Tested-by: Kuang-che Wu <kcwu@chromium.org>
Commit-Queue: Kuang-che Wu <kcwu@chromium.org>
Reviewed-by: Amin Hassani <ahassani@chromium.org>
Reviewed-by: Jae Hoon Kim <kimjae@chromium.org>
1 file changed