parrot: bugfix to make rec_mode work.

The following change that refactored separate pty drivers into one
  2b090c766e1b7b2142af19e84e76132a79bb1a3a
  hdctools: pty_driver: refactor _issue_cmd method.

Broke rec_mode for parrot due to EOL characters being different.

This CL fixes that issue.

BUG=chrome-os-partner:16759
TEST=manual,

1. sudo servod -b parrot
2. dut-control rec_mode rec_mode:on rec_mode rec_mode:off

Change-Id: I6f1d027e56b2be6e173f50c2f21a69a75095b3b5
Reviewed-on: https://gerrit.chromium.org/gerrit/46517
Tested-by: Todd Broch <tbroch@chromium.org>
Reviewed-by: Gediminas Ramanauskas <gedis@chromium.org>
Commit-Queue: Todd Broch <tbroch@chromium.org>
1 file changed