ectool: Add stress command to ectool
ectool: Add stress command to ectool

This command stress tests the channel between the user-side
ec command interface and the target MCU.
This can be used to expose rare communication errors, such as
exceeding communication timeouts.

BRANCH=none
BUG=b:131724307,b:116065496
TEST=make buildall -j
TEST=cros_workon --board=nocturne start chromeos-base/ec-utils
     emerge-nocturne chromeos-base/ec-utils
     cros deploy dut1 chromeos-base/ec-utils
     # On dut1
     ectool stress
     ectool --name=cros_fp stress
     ectool --name=cros_fp stress reboot

Change-Id: I485e915d0bc027ccee8d2d78b90fe0d066a3ff4d
Signed-off-by: Craig Hesling <383db090fd8ef907a606ac8a9eccd2962bc489cf@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/1686712
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec