pre-upload: switch to argparse

The optparse module is deprecated and crufty.  Use the new spiffy argparse.

BUG=None
TEST=`./pre-upload_unittest.py` passes

Change-Id: Ide23541d637d52132cef99817381892e64ea3c29
Reviewed-on: https://chromium-review.googlesource.com/236641
Reviewed-by: Nam Nguyen <namnguyen@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
1 file changed