chore(*): remove unneeded scripts
fix(chromeos-setgoodkernel): rename and fix for coreos

in coreos we have slightly different logic on setting up the next root
to boot. Fixup this script to follow that logic and rename.
feat(chromeos_legacy): add cgpt logic

add the logic to update the partition metadata in the postinstall
scripts.
fix(chromeos_legacy): remove HDROOT replacement code

we can remove this code now since we are using PARTUUID now.
fix(chromeos_legacy): refactor into two functions

refactor this into two functions, one of which will go away soonish.
chore(coreos-setgoodroot): fixup some comments
Merge pull request #1 from philips/coreos-conversion

Coreos conversion