cmds/pflask: unprivileged use requires prepopulated /dev
cmds/pflask: unprivileged use requires prepopulated /dev

so don't mount tmpfs at CHROOT/dev

Signed-off-by: Minux <72d850dbd8858b791995463d8539b5a379577f28@golang.org>

u-root/u-root,rminnich/u-root,hugelgupf/u-root,hugelgupf/u-root,rminnich/u-root,u-root/u-root,hugelgupf/u-root,GanShun/u-root,rminnich/u-root,GanShun/u-root,rminnich/u-root,GanShun/u-root,u-root/u-root,hugelgupf/u-root