ectool: provide lid angle info

Added new host command to support returning lid angle.

New output from ectool:

	System with lid angle support:
	------------------------------------------
	localhost ~ # ectool motionsense lid_angle
	Lid angle: 72

	System without lid angle support:
	------------------------------------------
	localhost ~ # ectool motionsense lid_angle
	EC result 3 (INVALID_PARAM)

BUG=none
BRANCH=none
TEST=run "ectool motionsense lid_angle"
     verify the value matches the physical lid angle position

Change-Id: I4179172c778f643640561e819216f7adfee679d2
Signed-off-by: Kevin K Wong <kevin.k.wong@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/313345
Reviewed-by: Shawn N <shawnn@chromium.org>
4 files changed