Use new outputs interface with engine

Use the new outputs interface, that uses the engine to provide a
formatter.

Signed-off-by: Mark Stemm <mark.stemm@gmail.com>

userspace/falco/falco.cpp

@@ -1134,7 +1134,8 @@ int falco_init(int argc, char **argv)
 
 		outputs = new falco_outputs();
 
-		outputs->init(config.m_json_output,
+		outputs->init(engine,
+			      config.m_json_output,
 			      config.m_json_include_output_property,
 			      config.m_json_include_tags_property,
 			      config.m_output_timeout,