Create the wificell_preflight pool.

More new devices are showing up that can only be run against ToT.
Creating a new pool and making sure only ToT tests are run against it.

TEST=None
BUG=chromium:360210

Change-Id: I4b485ca3c32e210e7ed3260d4b79708a558f291f
Reviewed-on: https://chromium-review.googlesource.com/193676
Tested-by: Kris Rambish <krisr@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: Kris Rambish <krisr@chromium.org>
1 file changed