Fix Chromecast bots

The psuedo-tty allocation seems to have been wrong and switching
to Kitchen exacerbated the matter.

Bug: skia:
Change-Id: Ie44d3952383d89d398722837e7bbc51798e5833e
Reviewed-on: https://skia-review.googlesource.com/122304
Commit-Queue: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Eric Boren <borenet@google.com>
Auto-Submit: Kevin Lubick <kjlubick@google.com>
Reviewed-by: Eric Boren <borenet@google.com>
6 files changed