Accton 2014.05

Hi:
We have created a version for Accton AS5712-54X. Please review it.
I do not believe this will be necessary in the final solution.

It looks like the idea of this change is rooted in the need to specify ttyS1 in the inittab.

I think the idea proposed by Stephen Su is a more workable solution for setting the default serial console.
See his pull request (not yet merged) -- https://github.com/onie/onie/pull/3