This is a reland of dd0c341b

The problem is that chromium-review.googlesource.com started requiring SNI.
httplib2 0.9.2 does not support that, but it seems to have been fixed since 0.10.1:

https://github.com/httplib2/httplib2/commit/8aaecf4496a2da0e902977e623a2d5e65528b6de


Original change's description:
> httplib: Update to 0.11.3
>
> The `DST Root CA X3` certificate was missing from cacerts.txt in the old
> version. This resulted in failure to connect to Let's Encrypt hosts.
> e.g., https://review.coreboot.org
>
> BUG=none
> TEST=Made sure my_activity.py continues to function and it can also
> connect to review.coreboot.org
>
> Signed-off-by: Raul E Rangel <rrangel@chromium.org>
> Change-Id: I519916b58a59b8f13c227218e93c392a63a24800
> Reviewed-on: https://chromium-review.googlesource.com/1173064
> Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
> Commit-Queue: Robbie Iannucci <iannucci@chromium.org>

Bug: 914564, 891505
Change-Id: Icd2a57da802864b2ebb17417b73434e1284a292d
Reviewed-on: https://chromium-review.googlesource.com/c/1432633
Auto-Submit: Edward Lesmes <ehmaldonado@chromium.org>
Commit-Queue: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>