make append to user costom

[Squirre17]

        self.cmd = '''qemu-system-x86_64
            -m 128M
            -kernel {bzimage_path}
            -initrd {modified_initrd_path}
            -append "root=/dev/ram rdinit=/sbin/init console=ttyS0 loglevel=3 oops=panic noquiet panic=-1 {kaslr} {kpti}"
            -no-reboot
            -cpu qemu64{cpu_protect}
            -smp {ct_num}
            -nographic
            -net nic,model=virtio
            -net user
            -s'''.format(
                bzimage_path          = config.bziamge_path,
                modified_initrd_path  = config.modified_initrd_path,
                cpu_protect           = cpu_protect,
                ct_num                = ct_num,
                kaslr                 = kaslr,
                kpti                  = kpti
        )

[Squirre17]

rdinit=/sbin/init root=/dev/ram