Sonic installer script for armhf#3303

Merged

lguohan merged 11 commits intosonic-net:masterfrom

antony-rheneus:sonic_arm_installer

Sep 11, 2019

Commits on Aug 8, 2019

Commits on Aug 18, 2019

[installer] uboot env settings removed from generic install.sh as it
antony-rheneus
committed

Commits on Aug 19, 2019

Added et6448m threshold limits
antony-rheneus
committed

Commits on Aug 21, 2019

[Platform] Added IPv6 arp limits
antony-rheneus
committed

Commits on Aug 22, 2019

[Readme] Updated readme for docker version in ARM
antony-rheneus
committed