Merge changes Ida58d13d,Ia9441cc5,Id840983d,I73611593

* changes:
  lmkd: Fix lmkd-test to work with relative paths
  lmkd: Implement lmkd-test
  lmkd: Introduce liblmkd_utils for communicating with lmkd process
  lmkd: Add support for multiple lmkd client connections