Add json-c as unit test build dependency

nbd-proxy.c needs json-c as dependency - CI run fails on that.

Added latest tagged git version (json-c-0.16-2022041) the same as in
the OpenBMC.

Tested:
locally passed run-unit-test-docker.sh on jsnbd repository.

Change-Id: I837247a2c4b9ebee3081cea3adae68364da269f9
Signed-off-by: Przemyslaw Czarnowski <przemyslaw.hawrylewicz.czarnowski@intel.com>
1 file changed