Update pyserial URL.

Update pyserial URL.

The old URL is a manual redirect to the new URL, so use the new UEL.

BUG=chromium:476190
Committed: https://crrev.com/9bb25dc77f4c2127100c584b124865b97981266b
Cr-Commit-Position: refs/heads/master@{#353507}

[bungeman-chromium, 2015-10-09 22:15:18]

The CQ bit was checked by bungeman@chromium.org to run a CQ dry run

[bungeman-chromium, 2015-10-09 22:15:31]

bungeman@chromium.org changed reviewers:
+ skyostil@chromium.org

[commit-bot: I haz the power, 2015-10-09 22:18:47]

Dry run: CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1403593002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1403593002/1

[commit-bot: I haz the power, 2015-10-10 00:54:19]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2015-10-10 00:54:20]

Dry run: This issue passed the CQ dry run.

[Sami, 2015-10-12 09:42:27]

lgtm.

[Sami, 2015-10-12 09:42:34]

The CQ bit was checked by skyostil@chromium.org

[commit-bot: I haz the power, 2015-10-12 09:43:16]

CQ is trying da patch. Follow status at
 https://chromium-cq-status.appspot.com/patch-status/1403593002/1
View timeline at
 https://chromium-cq-status.appspot.com/patch-timeline/1403593002/1

[commit-bot: I haz the power, 2015-10-12 11:03:30]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2015-10-12 11:04:11]

Patchset 1 (id:??) landed as
https://crrev.com/9bb25dc77f4c2127100c584b124865b97981266b
Cr-Commit-Position: refs/heads/master@{#353507}