Include sys/types.h for pid_t on FreeBSD
tests/signond-tests/mock-ac-plugin/access-control-manager.cpp fails to build on FreeBSD (11.0) with
error: unknown type name 'pid_t'.
This PR adds sys/types.h, which is also safe to include on Linux.
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
tests/signond-tests/mock-ac-plugin/access-control-manager.cpp fails to build on FreeBSD (11.0) with
error: unknown type name 'pid_t'.
This PR adds sys/types.h, which is also safe to include on Linux.