move utmp.h include to libbb.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/Config.in b/Config.in
index 1109b10..0ae48e9 100644
--- a/Config.in
+++ b/Config.in
@@ -284,17 +284,6 @@
 	  Don't enable this unless you have a really good reason to clean
 	  things up manually.
 
-config FEATURE_WTMP
-	bool "Support wtmp file"
-	default y
-	select FEATURE_UTMP
-	help
-	  The file /var/run/wtmp is used to track when users have logged into
-	  and logged out of the system.
-	  With this option on, certain applets (getty, login, telnetd etc)
-	  will append new entries there.
-	  "last" applet requires this option.
-
 config FEATURE_UTMP
 	bool "Support utmp file"
 	default y
@@ -304,6 +293,17 @@
 	  will create and delete entries there.
 	  "who" applet requires this option.
 
+config FEATURE_WTMP
+	bool "Support wtmp file"
+	default y
+	depends on FEATURE_UTMP
+	help
+	  The file /var/run/wtmp is used to track when users have logged into
+	  and logged out of the system.
+	  With this option on, certain applets (getty, login, telnetd etc)
+	  will append new entries there.
+	  "last" applet requires this option.
+
 config FEATURE_PIDFILE
 	bool "Support writing pidfiles"
 	default y