move utmp.h include to libbb.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

miscutils/last.c

@@ -8,7 +8,6 @@
  */
 
 #include "libbb.h"
-#include <utmp.h>
 
 /* NB: ut_name and ut_user are the same field, use only one name (ut_user)
  * to reduce confusion */

miscutils/last_fancy.c

@@ -8,7 +8,6 @@
  */
 
 #include "libbb.h"
-#include <utmp.h>
 
 /* NB: ut_name and ut_user are the same field, use only one name (ut_user)
  * to reduce confusion */

miscutils/runlevel.c

@@ -12,7 +12,6 @@
  * initially busyboxified by Bernhard Reutner-Fischer
  */
 #include "libbb.h"
-#include <utmp.h>
 
 int runlevel_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int runlevel_main(int argc UNUSED_PARAM, char **argv)

miscutils/wall.c

@@ -7,7 +7,6 @@
  */
 
 #include "libbb.h"
-#include <utmp.h>
 
 int wall_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
 int wall_main(int argc UNUSED_PARAM, char **argv)