common: quiet the POWERUP_REASON eval (errors out alot)

Change-Id: I1947418656187656e5e0a2112a3746513d46b157
common: bugfixes for fixboot.sh

Change-Id: Ie9b88d11c073124be0683c5577d57a89595f0299
common: cleanup killall script and add vfat + some common mounts

Change-Id: I30ef59920adbecdaa12d34547e758e9e6cb1a4b0
samsung/jf-common: create recovery/root/etc for twrp.fstab to live in

Change-Id: Id8537b36194c450a7bcd2e34c22944378166010d