rootfs version  1.2.1   2020.06.8       by Winson
  ->Fix recovery issue.

rootfs version  1.2.0   2020.04.23	by Winson
  ->Replace x86 OS to x86_64 OS(kernel 4.14.12-rt10)
  ->Boot time reduce to 14 seconds.

rootfs version  1.1.2   2019.7.05       by Winson
  ->Add demo getmobus, setmodbus

rootfs version  1.1.1   2018.6.7        by Winson
  ->Use 4.14.12-rt10 as the default kernel version.
  ->Support HDMI.
  ->Add command "LINPAC_SDK", "OS_version".

rootfs version  1.1     2017.12.1       by Winson
  ->Extend Hardware Watch dog time out.
  ->Add Ethernet backup mechanism. (mstpd)
  ->Add command "icpdas_pps".
  ->Add i-Talk utility.

rootfs version  1.0     2017.03.20      by Winson
  ->Package new root file system