ecdsa: upgraded package to upstream

Upgraded dev-python/ecdsa to version 0.13 on amd64

BUG=b:71716742
TEST=none

Change-Id: Ic7714b77bd317d9a8362a9e4a2f65d2d9a345973
Reviewed-on: https://chromium-review.googlesource.com/942306
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Tested-by: Lei Liu <leliu@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
4 files changed