Update SRCREVs for the agl-service-audiomixer and agl-service-hvac
services as well as the dashboard and agl-cluster-demo-dashboard apps
to pick up fixes for signal changes in KUKSA.val 0.2.5.
Bug-AGL: SPEC-4587, SPEC-4598
Change-Id: I581ad6560032c76458e00658b750cba7d0b6e1de Signed-off-by: Scott Murray <scott.murray@konsulko.com>