Fix the real problem with missing UFS/MSDOSFS labels on the

FreeBSD/arm builds.  The problem stems from the loader.rc file
not existing, as well as geom_label not being loaded at boot.

For now, add the geom_label_load entry to loader.conf, and
symlink loader.rc.sample to loader.rc, both of which allowed
my BeagleBone Black to boot fine with a UFS label reference in
fstab(5).

MFC after:	3 days
X-MFC-Before:	10.2-BETA1
Sponsored by:	The FreeBSD Foundation

release/tools/arm.subr

@@ -140,6 +140,11 @@ arm_install_base() {
 	echo 'sendmail_msp_queue_enable="NO"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
 	echo 'growfs_enable="YES"' >> ${CHROOTDIR}/${DESTDIR}/etc/rc.conf
 
+	# The fstab(5) above uses UFS/MSDOSFS labels.
+	echo 'geom_label_load="YES"' >> ${CHROOTDIR}/boot/loader.conf
+	# Workaround missing loader.rc if needed.
+	chroot ${CHROOTDIR} ln -s /boot/loader.rc.sample /boot/loader.rc
+
 	sync
 	umount_loop ${CHROOTDIR}/${DESTDIR}