test/policy-parser: fix wrong function definitions
test/policy-parser: fix wrong function definitions

Empty paranthesis are legacy C. Always use '(void)', otherwise
arbitrary argument-lists can be passed to the function, which is really
not what we want.

Signed-off-by: David Herrmann <fb53b2ddb8d141e0cb39d7c67c2f81b6bc2eb0f7@gmail.com>

bus1/dbus-broker