reset container tty after container stopped
reset container tty after container stopped

so that we can reconnect it when container restarted. (hyperhq/hyperd#539)

Signed-off-by: Wang Xu <0e9dfdf30d71e7ded2bba4a3dc006039c4b00f3d@gmail.com>

hyperhq/runv,bergwolf/runv,bergwolf/runv,hyperhq/runv,feiskyer/runv,hyperhq/runv,jinfenw/runv,laijs/runv,gnawux/runv,gao-feng/runv,feiskyer/runv,gao-feng/runv,laijs/runv,jinfenw/runv,bergwolf/runv,gnawux/runv,gao-feng/runv,gnawux/runv,laijs/runv,jinfenw/runv