Add Gyroscope sensor userspace driver

Based on the hardware/invensense/libsensors/ example

Requires:
http://review.cyanogenmod.org/#/c/29733/

Change-Id: Idafa069182d60b1be02d018cd208c9e18ac7c853

Conflicts:

	libsensors/nusensors.cpp
Merge branch 'jb-camera' of https://github.com/shumashv1/android_device_hp_tenderloin into jb-camera

Conflicts:
	libsensors/MPLSensor.cpp
	libsensors/nusensors.cpp
	libsensors/sensors.c