migrate-nilrt: Add ARM forward migration logic
migrate-nilrt: Add ARM forward migration logic

CG targets can be migrated to NG both from safemode and runmode by
running ni_migrate_target which detects the machine architecture and
wether the machine is booted in safemode or runmode in order to migrate.
For more details on how this works, consult the script comments.

Signed-off-by: Ioan-Adrian Ratiu <7ec73abcfe099fc5574c01312b62768070c80980@ni.com>

ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt,ni/meta-nilrt