Set owner of /var/run/utmp to root:utmp

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>

helpers.h

@@ -5,6 +5,7 @@ int	makepath	(char *);
 void	ifconfig	(char *, char *, char *, int);
 void	copyfile	(char *, char *, int);
 void	chomp		(char *);
+int	getgroup	(char *);
 
 #ifdef BUILTIN_RUNPARTS
 int	run_parts	(char *, ...);