EC fix, that changes format from:
0: 300
to
0: 300 K
https://chromium-review.googlesource.com/#/c/chromiumos/platform/ec/+/763996

Autotest fix:
https://chromium-review.googlesource.com/#/c/chromiumos/third_party/autotest/+/763578

I also looked at:
 - client/cros/ec.py: That uses regex that will work with units as well: '''TEMP_SENSOR_RE = "Reading temperature...([0-9]*)"'''
 - server/site_tests/firmware_ECAdc/firmware_ECAdc.py: This test seems broken anyway (tries to run ectool temps that would not work?)
 - server/site_tests/firmware_ECThermal/firmware_ECThermal.py: Uses a regex that'll work too: '''pattern = re.compile('Reading temperature...(\d*)')'''

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/platform/ec/+/bce7b5b4b69f5d397f6ee17b0400a31a4d385317

commit bce7b5b4b69f5d397f6ee17b0400a31a4d385317
Author: Nicolas Boichat <drinkcat@chromium.org>
Date: Sat Nov 11 20:13:42 2017

ectool: Print temperature unit in ectool temps output

Currently, 'ectool temps all|<n>' just prints "300". This may easily
be mistakenly read as tenth of degree C (30.0 C), as the value
appears to make sense (close to room temperature). However, the value
is actually 300 K (27 C).

CQ-DEPEND=CL:763578
BRANCH=none
BUG= chromium:783845 
TEST=ectool temps all shows temperature unit (K)

Change-Id: I70f7f04d061cb1d4f741d59f8b48c7963dd8280f
Signed-off-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/763996
Reviewed-by: Shawn N <shawnn@chromium.org>

[modify] https://crrev.com/bce7b5b4b69f5d397f6ee17b0400a31a4d385317/util/ectool.c

The following revision refers to this bug:
  https://chromium.googlesource.com/chromiumos/third_party/autotest/+/eebd1225a4b967e98ca417eb4e373ece67670f49

commit eebd1225a4b967e98ca417eb4e373ece67670f49
Author: Nicolas Boichat <drinkcat@google.com>
Date: Sat Nov 11 20:13:42 2017

utils: Allow ectool temps all to show units

To reduce potential confusion, ectool temps all now includes
temperature unit. Adjust get_ec_temperatures to handle that.

BUG= chromium:783845 
TEST=python
     >>> pattern = re.compile('.*: (\d+)')
     >>> line='0: 300'
     >>> matched = pattern.match(line)
     >>> int(matched.group(1)) - 273
     27
     >>> line='0: 300 K'
     >>> matched = pattern.match(line)
     >>> int(matched.group(1)) - 273
     27

Change-Id: Ia8bd34dbef18ccdc23d58729eb45b0ab4edd002b
Reviewed-on: https://chromium-review.googlesource.com/763578
Commit-Ready: Nicolas Boichat <drinkcat@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Reviewed-by: Wai-Hong Tam <waihong@google.com>

[modify] https://crrev.com/eebd1225a4b967e98ca417eb4e373ece67670f49/client/bin/utils.py