Pass the '-b' argument to pw(8) so the '/home' directory is created

in the correct place.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation

release/tools/arm.subr

@@ -85,7 +85,8 @@ arm_create_user() {
 	chroot ${CHROOTDIR} /usr/sbin/pw -V ${DESTDIR}/etc \
 		useradd freebsd \
 		-m -M 0755 -w yes -n freebsd -u 1001 -g 1001 -G 0 \
-		-c 'FreeBSD User' -d '/home/freebsd' -s '/bin/csh'
+		-c 'FreeBSD User' -d '/home/freebsd' -s '/bin/csh' \
+		-b "${DESTDIR}/home"
 	chroot ${CHROOTDIR} /usr/sbin/pw -V ${DESTDIR}/etc \
 		usermod root -w yes