tests/sys/audit: add missing comma delimiter between fields

This makes the `kyua report --verbose` output a lot easier to parse when
looking at failed tests. It also fixes the closefrom() test since I
tested my changes with this commit but forgot to push it together with
fa32350347.

Fixes:		fa32350347 ("close_range: add audit support")

tests/sys/audit/utils.c

@@ -79,6 +79,7 @@ get_records(const char *auditregex, FILE *pipestream)
 
 		/* Print the tokens as they are obtained, in the default form */
 		au_print_flags_tok(memstream, &token, del, AU_OFLAG_NONE);
+		fputc(',', memstream);
 		bytes += token.len;
 	}