meta-facebook: yosemitev2: Add dbus sensor and entity manager

Added dbus-sensors and entity manager packages for yosemiteV2 platform.

Tested : Built Facebook YosemiteV2 images and loaded on
the target hardware. We are able to read temperature,
Adc and mezz sensor values.

(From meta-facebook rev: 9b7491ca408796249045abb85151973724cadb34)

Signed-off-by: Kumar Thangavel <thangavel.k@hcl.com>
Change-Id: Ia9acf270752d602d71008893366a6c2f0badf9bc
Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>