tweaks to see if i can get overlayfs working happy with systemd.

see https://projects.archlinux.org/archiso.git/commit/?id=a637bdb8574168ab4cddef13d5de7f458650bda5, changes to archiso/initcpio/hooks/archiso

extra/packages.both

@@ -115,6 +115,7 @@ hddtemp
 hdparm
 hexcurse
 hexedit
+hfsprogs
 hfsutils
 htop
 httping

extra/pre-build.d/usr/lib/initcpio/hooks/livecd

@@ -6,10 +6,13 @@ run_cleanuphook () {
 
 	echo "Now attempting overlay mount..."
 
-	mkdir /new_root.hw
+	#mkdir /new_root.hw
-	mount --move /new_root /new_root.hw
+	mkdir -p /run/archiso/cowspace/upperdir /run/archiso/cowspace/workdir
-	mkdir /dev/shm
+	#mount --move /new_root /new_root.hw
-	mount -t tmpfs none /dev/shm
+	#mkdir /dev/shm
-	mount -t overlay overlay -olowerdir=/new_root.hw,upperdir=/new_root,workdir=/dev/shm -o noatime
+	#mount -t tmpfs none /dev/shm
+	#mount -t overlay overlay -olowerdir=/new_root.hw,upperdir=/new_root,workdir=/dev/shm -o noatime
+	umount -l /new_root > /dev/null 2>&1
+	mount -t overlay -o lowerdir=/run/archiso/sfs/airootfs,upperdir=/run/archiso/cowspace/upperdir,workdir=/run/archiso/cowspace/workdir airootfs /new_root
 	pkill -9 dropbear #kill SSH (in preparation for the live system starting ssh on port 22
 }