crosperf: use cros_utils instead of utils.

We got some lint warnings about some module is not in utils.
So we change the name.
This CL creates a symbolic link cros_utils from utils. Once we are sure
that we clean all the code, we can rename the utils to cros_utils
directly.

BUG=chromium:567921 chromium:568195
TEST=the lint warning is gone.

Change-Id: I776e45c7bdd75d1f065ea5797f3bcff457203ca2
Reviewed-on: https://chrome-internal-review.googlesource.com/241457
Commit-Ready: Caroline Tice <cmtice@google.com>
Tested-by: Caroline Tice <cmtice@google.com>
Reviewed-by: Caroline Tice <cmtice@google.com>
16 files changed